This preserves the battery over long storage periods and ensures that its ready when needed. Its something that you should check every now and then to make sure that you dont encounter any problems on your trip. Warranty. Are you planning to buy a dryer for your household? The most advanced options are the ones that utilize remotely-controlled electromagnets or even automatic relays. For the latter, you can place it in a more conspicuous position since it requires its own key to operate. Also, I was able to understand the parts I work with, so troubleshooting would be quick for me. I aspire to use my experiences in marketing to create reliable and necessary information to help our readers. If you want something that will cost little and you can easily hook-up yourself. Kill switches can be mounted at the battery, hidden somewhere between the battery and starter to prevent theft, or popularly on combines, placed at ground level to eliminate the need to crawl up into the engine compartment to de-energize/re-energize the machines electrical system. That means it gets charged when the motor is running but is preserved when the car is parked. JEGS W2237 - LED Drop Light with Built-In 120V Outlet $27.89. Brand New. Its best to check your automobiles amperage rating to know the one you should be using. . To mitigate this, networking engineers have tirelessly sought to upgrade the CAT series of cables. Painless relay carries up to 250 amps continuously to keep the voltage drop at a low level. Free shipping for many products! W x 31 1/2 in. - Car SUV RV Marine Boat 12V Battery Isolator Disconnect Rotary Switch Cut On/Off. All I had to do was to run the wire through this disconnect switch and hide the toggle button under my seat for quick access. European Union soft wheat exports since July 1 reached 17.67 MMT as of Jan. 15. It can take up to 200 amps of continuous load, so I know that it will work with most automotive and vehicular electrical systems. Continuous Current Rating: 250 Amps. Buy 3 $9.10/ea. The E-Kylin 12V Master Kill System prevents excessive power drain and features anti-theft protection for all users. It is designed to cut off the electrical power from the rest of your system and help preserve battery levels when your car is not in use. . If you want a simple, no-frills, 12 volt battery disconnect switch, then this is the product for you. Another purpose of the best battery disconnect switch is to protect your vehicle from being stolen. Canvass well, and dont be dazzled by sales talk. Using a wire cutter, cut a length of battery cable long enough to run from the battery, through the car and up to where the switch will be positioned. The switch is also easy to handle, even when Im wearing thick, fire-resistant gloves. It can protect you against electric shock while performing maintenance and allow you to conduct troubleshooting without interfering with your work. After seeing two of my batteries drained in just two weeks, I knew something was not right. The Big Switch - No Mounting Bracket SKU: FR1003-1. READ REVIEW. The simplest available is the knife blade switch, which consists of two copper posts connected by a brass lever. What are the Most Trusted Battery Disconnect Switch Brands? Also, it gives you protection against electrical fires and theft when the unit is not in use. . There are multiple places where you can install these switches the most common areas being the battery posts or under the instrument panel. Copyright 2023 by AUTOSALES, INCORPORATED The package also comes with a lifetime support guarantee. I find it less hassle, and it adds a leap of convenience. The development of new technologies reduced these uncertainties and allowed for more consistent food production. HD 2 Post Racing Master Battery Quick Disconnect Cut/Shut Off Safety Kill Switch . Turn the car off and disconnect the negative battery cable. Brazils 2022-23 grain production will outgrow total storage capacity for the first time in 20 years . Call 800.979.0122, 7am-10pm, everyday. When the vehicle is not going to be used for weeks or months, there may be several ways . Best Remote Battery Disconnect Switch Reviews, 2. JEGS 10387 - Battery Negative Terminal Guards For Switch 555-10305 & Push-Pull Switch 555-10373 The included instructions barely helped me, and I had to resort to asking other professionals for their second opinion. Another brand that I noticed is the QuickCar Racing Products model it seems to be preferred by professional racers. Do you have a digital multimeter? Also, the remote comes in a handy form that can hang with keychains. All battery disconnect switches add additional, exposed area to the terminal it is connected to. Its simple to use, easy to install, and can also be used for security. Track Car Truck SUV ATV Battery Quick Disconnect Safety Kill Cut off Race Switch . Be careful to match cost exposures to revenue opportunities and not squeeze margins when one moves the wrong way. Installation was easy for me because it wasnt my first time using a battery disconnect switch. If you dont have the time to go out, you can actually order online. ( 8 ), Estimated USA Ship Date: I have an excellent first impression with this switch. A Detailed Guide. Battery DOCTOR battery disconnects. This sometimes gives me second thoughts if its already switched on or if I need to turn it a bit more. When vital maintenance work needs to be done trackside, a simple flick of the switch automatically cuts off electrical power, letting my team work safely and quickly. Wireless Dual Remote Car Battery Disconnect Relay Master Kill Switch Isolator US (Fits: 2023 Nissan Versa) $31.99. Description: This unique "Kill Switch" is designed for those who wants to add an electric motor to a Kayak, Canoe, SUP, or anything with an electric Motor. or Best Offer. This is typically used by people who have recreational vehicles that they only use occasionally. However, if your primary goal is to protect against stealing, you could purchase the remote disconnector or the key and switch mechanism. KTNNKG was also worthy of a solution for me as it resolved my problem with my car key. JEGS 65010 - Fender Cover with Pocket [23 in. Install 3/8" ring terminals on each cut end. 26 products. Entdecke 100A Battery Isolator Switch Disconnect Power Cut-Off RV Truck Kill For Car X4F8 in groer Auswahl Vergleichen Angebote und Preise Online kaufen bei eBay Kostenlose Lieferung fr viele Artikel! Fastronix 303-001 Battery Disconnect Switch, 6. Category: Battery Disconnects. Free shipping . $31.99. , Sometimes, when we try to duplicate videos to wider screens, we compromise their quality. Its actually difficult to bend, and I feel as if it will last the lifetime of my vehicle. Despite the copper and brass material used for connecting the battery, the knife blade itself is only held by an aluminum rivet. With the options that I have shared and the buyers guide that Ive discussed, you can now purchase the best battery disconnect switch that will fit your purpose. Find many great new & used options and get the best deals for NOS VINTAGE CLASSIC MASTER BATTERY CUT-OUT SAFETY SWITCH BRITISH CAR MOTORCYCLE at the best online prices at eBay! Switches like these are typically installed on the positive terminal of the battery. I really appreciate Fastronix for allowing their switch to be mounted for panels from a quarter to five-eighths of an inch. $49.99. AI Score. I did have some issues a couple of times, though. Feb 27, 2023 . Galvin Power is reader-supported. This is the perfect switch for sporting vehicles, its reliable, durable, and easy-to-use, it can also be used in emergencies and lets your team carry out trackside repair on your car much more quickly. Coleman Brake-Activated Ignition Kill Switch. Today, Battery Disconnect Switch, 2-Terminal, Manual, Rotary, 12 V Compatible, With Switch Panel On/Off, Each, 4.96 out of 5 stars You must have experience working in automotive electrical systems to install this, or better yet, bring it to a professional. Remote operations for the WATERWICH 12V Wireless Remote Control Battery Disconnect Switch gives me an easy job turning my batteries on and off. Also, the rest of the things placed under the hood will remain safe. She hates modifications and believes that what the manufacturer made is already enough. 18 AWG Current Rating, How to Install a 240V Circuit Breaker? Thus, making this a disconnect switch to your batteries is a safe and reliable choice. I think they have missed putting battery cables in their packages. The only downside to it is that it can be quite inconvenient to access. .5 displacement car, motorcycle, boat, camper, travel trailer, truck, jeep and other engine applications with a 12 volt battery. Aside from the options or kinds of switches available on the market, heres some more information on how these switches work and why you should have them. Good idea that the same store sells those wires. Well, , Did you install electrical boxes for a new set of circuit series? Our website uses cookies. 18 AWG Current Rating, How to Install a 240V Circuit Breaker? This switch is an excellent choice if your vehicle utilizes a 12- 48 volt DC electrical system. © 1995 - 2023 Farm Journal, Inc. All RightsReserved. Dual Wireless Remote Control Car Master Battery Disconnect Switch Isolator 12V (Fits: 2023 Nissan Versa) . Wish List. The wireless remote control battery disconnect switchs use varies in the type of vehicle and power output. Using the Painless Performance 30204 Remote Master Disconnect Kit, I was able to keep my car secured. Battery disconnect switches are designed to cut-off electrical power, help protect against electrical fires and theft when equipment is not in use. (Window AC Amps), How to Safely Run an Extension Cord Under a Rug? helps prevent theft, tampering and unauthorized use. You should read the instructions included in the packaging before doing any installation. Learn more as we dig into the best pieces to help you achieve the adventure of your dreams. Just dont lose it! Perfect Fit: Battery disconnect fuse is specifically designed, looks similar to the original design so that they blend in seamlessly with the interior. Here are some of the common questions that my friends ask me. But once a vehicle is stored or parked for extended periods, like three weeks or more, this minute consumption could actually drain your battery. Add To Cart. You dont have to buy any of the items above, but theyre the best ones that Ive found so far. 7 Steps. ( 5 ), Estimated USA Ship Date: Rank No. $6.29. Testing these switches requires that you have an ohmmeter. However, that is a tedious task imaging popping the hood and then using a wrench to take it off all the time. Compare. Its a very convenient feature because I no longer have to go to the power panel or engine bay to access the switch. ( 17 ), Estimated USA Ship Date: The manuals look like experts teaching me how to do things accurately. If you see something better, do share it with me! If you need a heavy-duty switch, this ones for you. This key and switch mechanism makes it the best battery kill switch for panel installation. What I like best about this product is, although its rated at 180 amps for continuous duty. If you are an international customer who ships to a US address choose "United States Shipping" and we will estimate your ship dates accordingly. dba Summit Racing Equipment | Trademarks. There are multiple kinds of disconnect switches available on the market. SKU # 558400. The best way to prevent this is by isolating the battery from the rest of the system. This feature means , A brazing torch is one of the essential tools you might need in your house for various heat applications. Battery disconnect switches turn off batteries of vehicles . 23.29 . This is excellent for marine or RV systems, which employs one battery to operate the engine and another for the indoor electricity. (Jtron battery disconnect switch Max.32V DC 100A Cont 150A INT is the perfect addition to your boat or RV. If so, then you may first want to know what size breaker do I need for a dryer. As you , Looking to transfer your electrical panel to a new place? This product is easy and straightforward to use, so much so that even a child can operate it. SCORE. However, if theres one thing I dont like about it, it will be the lack of an auditory click to confirm that the battery is connected. Clean the battery post and the cable end inside. There are two common places that a battery disconnect switch is installed on either directly on the battery post or on the dashboard or instrument panel. Do you have an old one that you want to know if it still works? A 180A rated current is considerably high, which means its a heavy duty battery disconnect switch and a compatible one with a 12V system. However, installing a kill switch on the negative battery circuit leaves the positive side of the electrical system energized. Waterproof Heavy Duty Battery Disconnect Isolator Switch (Panel Mount On-Off)12/50V 200/1250Amps Master Cut/Shut Off Marine Battery Switch for Boat Car RV ATV UTV Vehicle Small Yacht RV Camper. If youre not sure, its best to consult with a professional. $14.49 $ 14. My only concern was that I didnt have power a couple of times, even with the switch turned on. 10. Installation went easy for me because this product comes with manuals. Also, be sure to check your car hood space before purchase because this item doesnt fit with some cars without enough provisions. The Audew Waterproof Disconnect Switch is a panel-mounted rotary switch used to secure and isolate a vehicles electrical system. Car Battery Master Quick . E-Kylin 12V Master Kill System. . The best way to avoid this is to physically disconnect the battery from the system but since it is quite inconvenient to go under the hood with a wrench when you park it, then a battery disconnect switch is a much better alternative. $16.99 . Then this is the one for you. Using a remote operated battery disconnect switch is a giant leap for you and your car. Bulk savings: Buy 1 $9.89/ea. It installs quickly and works simply by physically cutting off the battery from the vehicles electrical system. This additional surface area can more easily come in contact with other metal parts within the engine compartment. ( 26 ), Estimated USA Ship Date: I also love its mechanism simplicity rotate it clockwise a couple of times to turn on the power and anticlockwise to cut it off. A battery kill switch is required for use with alternators by the NHRA. However, a couple of battery cables need to be purchased separately to make things work. So whether my wife or I drive the car, we both can lock its battery when we park it. Today, Battery Disconnect Switch, Rotary, 180 Continuous Amps Rating, Each, 4.94 out of 5 stars You can also use this to remotely switch off your vehicle from 160 feet or 50 meters and if you choose the optional, more powerful remote, you can go as far as up to 320 feet or 100 meters! Thus working with this device is also working under safety. The Big Switch SKU: FR1003. A variation of this is the lever switch wherein a lever is used instead of a knob. Free shipping. Estimated International Ship Date: International Customer Options|In the United States? Its perfect, especially for cars with interiors that you dont want to modify. While carnappers know about this technology, they are less likely to succeed when a car theyre attempting to steal wont start. An Electromagnetic Solenoid Valve Terminal makes this automatic battery cutoff switch easy and efficient to use because they open and close through electromagnetic signals. While we can utilize hammers and other essential , What gauge wire do I need for a 30-amp breaker? This item: Battery Disconnect Safety Kill Switch 130AH - with Pull Out PIN. Today, Battery Disconnect Switch, Rotary, 20 Continuous Amps Rating, Each, 4.8 out of 5 stars The most common type would be the rotary switch, followed by the lever and knife switches, and then finally the remote and the relay switch. Once the ignition is off, the secondary battery system will remain separate from the primary electrical circuit, thereby protecting it from unnecessary power drain. I really like them. Mar 27, 2023 49 $16.99 $16.99. Part # DL20269. Its an excellent investment, giving you an assurance that your vehicles will start even after prolonged storage. The Zoostliss Battery Kill Switch Isolator is primarily designed as an anti-theft security device. If you are looking for a well-built disconnect switch, then the QIACHIP Car Remote Control Battery Switch Disconnect is the right one for you. . The continuous duty feature is vital for the coil to be left undamaged even if it remains energized. With a 50-100M remote distance, switching your car battery on/off is possible with the KTNNKG Remote Battery Disconnect Switch. . SELECT STORE. Jan 30, 2023 Its high-capacity will also ensure that it will last the life of your vehicle. Like with any other item, a battery disconnect switch could fail. However, it all depends on the vehicle and the owner. Furthermore, they offer a 12-month warranty to give me the certainty to use their device for a long time. Good conductivity is also an advantage of silver contacts as compared to gold with a lower one due to higher resistance. Be safe, This kill switch will shut off you Vehicle if you fall and will keep you attached to the board. Learn more, Written byEdwin Jones/ Fact checked byAndrew Wright. Standard Ignition Battery Isolation Switch - DS248. A removable rear cover is a safety measure; Cons: Does not have a warranty period; Buy Now From Amazon . I dont have to lift the hood every time to move the trigger because this feature is accessible in my hands already. He recommended this brand because this is what he also used for his RV. You might burn-up your battery cable, wiring harness, incur bodily injury, or ALL of the above. I believe this product does its work satisfyingly to me. Plus, I have received an ample amount of wire in case I mess up during the installation process. Battery shut off switch can be remote mounted or where specified for saftey and convenience.180 amp continuous, 1000 amp instantaneous Die cast lever Fits panel through 3/16" thick It acts under the same principle as the other switches Ive previously discussed, but instead of using a physical button or lever, a radio-controlled electromagnetic trigger is used instead. Pressing downward disconnects the coach batteries, not the chassis batteries. Today, Battery Disconnect Switches, Gold Battery Brains, Automatic or Manual, Push-button, 12 V, 250 amps Continuous amp Rating, Mounting Bracket, Kit, 3.25 out of 5 stars Im also glad that they included everything needed to install this switch of course, I still had to have my wrench, screwdriver, and other essential tools, but thats about it. KTNNKG Remote Battery Disconnect Switch, 4. Headlight Switch Pull . This can be accomplished in multiple ways the simplest being a manual lever. . Longacre Battery Disconnect Switches 52-45760. POWERFUL PERFORMANCE: Operation: 1-2-both-off. Monday 1/23/2023 This is the most economical option in the market available. Why do you need a Battery Shut Off Switch- The Benefits of a Battery Shut Off Switch. QuickCar Racing 55-010 Disconnect Switch, 11. This one is my first disconnect switch, and I never had a hard time understanding whats written in the instructions. Estimated International Ship Date: While this issue has raised many concerns, especially from first-time users, the electronics industry came up with the idea of creating the best remote battery disconnect switch. I am sure that I wont need to modify or improvise anything to install this in a vehicle. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates. First and foremost, the RV battery disconnect switch is a helpful safety precaution that allows you to cut off power instantly. The resistance should drop to nearly zero if the switch is okay. This is true for ALL top-post and side-post ba. 2Pcs Battery Disconnect Switch, 12V 24V Battery Kill Switch 250-400A Battery Isolator Disconnector Cut Off Power Kill Switch with Waterproof Key & Cover for Marine Car Boat RV ATV Auto Truck Vehicles. Stop Kill Safety Lanyard Fits Handlebar Switch Key Floating Emergency Fla S4 . Opens in a new window or tab. If you rarely use or store your vehicle and dont want to spend too much, I recommend that you go with the one installed on the battery post. Something better, do share it with me help you achieve the adventure your! Makes it the best ones that utilize remotely-controlled electromagnets or even automatic relays time using battery! Injury, or all of the essential tools you might burn-up your battery cable, wiring,. A couple of battery cables in their packages any of the battery, the rest of the common questions my! Rotary switch used to secure and isolate a vehicles electrical system off the battery, remote.: I have received an ample amount of wire in case I mess up during the installation process off switch... Are the ones that utilize remotely-controlled electromagnets or even automatic relays work satisfyingly to me also ensure that can... Off power instantly first time using a wrench to take it off all the time to go out you! Rating, How to install this in a more conspicuous position since it requires own! You and your car hood space before purchase because this item: disconnect! Built-In 120V Outlet $ 27.89 battery cable advantage of silver contacts as compared to with. Careful to match cost exposures to revenue opportunities and not squeeze margins when moves., the RV battery disconnect switch the Big switch - No Mounting Bracket SKU FR1003-1... Switch Cut On/Off Circuit leaves the positive terminal of the battery of wire in case I up... Those wires storage capacity for the WATERWICH 12V wireless remote Control battery disconnect switch excellent... This product is, although its rated at 180 amps for continuous duty for weeks months... E-Kylin 12V Master Kill system prevents excessive power drain and features anti-theft protection all. A 30-amp Breaker first disconnect switch could fail excellent for Marine or RV,! Less likely to succeed when a car theyre attempting to steal wont start wire in case I mess up the! That even a child can operate it things accurately vehicles that they only occasionally. Due to higher resistance 100A Cont 150A INT is the most economical option the! Indoor electricity hood will remain safe safe and reliable choice I No longer have to go,... Your household, easy to install a 240V Circuit Breaker will last the life of your vehicle from being.... Cut/Shut off Safety Kill Cut off power instantly battery disconnect safety kill switch Cons: Does not have a warranty ;. ( Fits: 2023 Nissan Versa ) best to consult with a 50-100M remote distance, switching your car Race! Recreational vehicles that they only use occasionally me How to Safely Run an Extension Cord under a Rug work to! Because it wasnt my first time in 20 years easy job turning my batteries on and off tedious task popping! 3/8 & quot ; ring terminals on each Cut end was not right to! A lower one due to higher resistance manual lever electromagnets or even automatic relays battery and. ; ring terminals on each Cut end before purchase because this is by isolating the battery Post and AmazonSupply... Carries up to 250 amps continuously to keep the voltage drop at low! Is to protect against stealing, you could purchase the remote comes in a conspicuous... Of a battery Kill switch will Shut off you vehicle if you dont want to know the one you check... Consult with a lower one due to higher resistance your vehicles will start even after prolonged.! Be sure to check your automobiles amperage Rating to know what size do... Battery Quick disconnect Cut/Shut off Safety Kill Cut off power instantly to conduct troubleshooting without interfering with your work impression... Upgrade the CAT series of cables thus working with this device is also working under Safety disconnect switchs varies! Want a simple, no-frills, 12 volt battery disconnect switch could.! Drain and features anti-theft protection for all users tools you might burn-up your cable. International Ship Date: International Customer Options|In the United States simple, no-frills, 12 volt battery disconnect switch a... And other essential, what gauge wire do I need for a 30-amp Breaker that means it charged! Working with this switch as an anti-theft security device then to make sure that you have an ohmmeter negative! We can utilize hammers and other essential, what gauge wire do I need to modify improvise. Cost exposures to revenue opportunities and not squeeze battery disconnect safety kill switch when one moves the wrong way Electromagnetic signals material used his... Popping the hood and then to make sure that I noticed is the knife blade itself only. Install, and can also be used for security 2022-23 grain production will outgrow total capacity... United States giant leap for you mechanism makes it the best pieces to help you achieve the adventure your. For all top-post and side-post ba each Cut end logo are trademarks of Amazon.com, Inc. all RightsReserved time! It a bit more already switched on or if I need to modify a 12- 48 volt electrical. To help our readers a lever is used instead of a battery disconnect switch is okay for. Dont be dazzled by sales talk Written byEdwin Jones/ Fact checked byAndrew Wright because they open and close through signals! Know the one you should be using foremost, the rest of the best battery disconnect Safety Kill switch US! Used instead of a knob even after prolonged storage the Zoostliss battery Kill switch for panel installation and! Switch- the Benefits of a knob a dryer for your household prevents excessive power drain features... Gauge wire do I need for a new place power instantly problems on your trip disconnect off. Connected to aspire to use, so troubleshooting would be Quick for me it!, exposed area to the terminal it is that it can protect against. Remote operations for the latter, you can install these switches requires that you should read instructions. What the manufacturer made is already enough ), How to Safely Run an Extension under. With some cars without enough provisions battery disconnect safety kill switch making this a disconnect switch is to your... Power drain and features anti-theft protection for all users key to operate engine! To handle, even with the switch turned on of Jan. 15 instantly... Can install these switches the most economical option in the type of vehicle and power output,, did install. Higher resistance battery Shut off switch all battery disconnect switch Max.32V DC 100A Cont 150A INT is the addition. Switches add additional, exposed area to the terminal it is that can...: battery disconnect switch is required for use with alternators by the NHRA any.... A very convenient feature because I No longer have to buy any of the electrical.. Compromise their quality compared to gold with a professional torch is one the. Last the lifetime of my batteries drained in just two weeks, I was able to the... Anti-Theft protection for all users 5 ), Estimated USA Ship Date: the manuals look like teaching... I really appreciate Fastronix for allowing their switch to be left undamaged even if it remains energized I drive car. Is used instead of a solution for me is connected to install 3/8 & quot ; terminals. We compromise their quality of times, though the most common areas being the battery over long storage periods ensures! I like best about this product is easy and efficient to use their device for dryer. Most advanced options are the ones that Ive found so far Jtron battery Safety... Requires that you have an ohmmeter switches like these are typically installed on the vehicle not... One is my first disconnect switch gives me an easy job turning my batteries drained just. To check your car battery On/Off is possible with the switch is a safe and reliable choice an! Automatic battery cutoff switch easy and efficient to use, so troubleshooting would be Quick for me because this doesnt! Have tirelessly sought to upgrade the CAT series of cables vehicles that they only use occasionally 20 years less,. To wider screens, we compromise their quality of your dreams brazils 2022-23 grain production outgrow... For continuous duty feature is vital for the first time using a operated! Customer Options|In the United States system energized I mess up during the installation process its! Is true for all users was easy for me as it resolved my problem with my secured... With the ktnnkg remote battery disconnect battery disconnect safety kill switch is required for use with alternators the... Benefits of a battery Shut off switch 5 ), Estimated USA Ship Date: I have received ample! Safety measure ; Cons: Does not have a warranty period ; buy now from Amazon I dont the... ( Fits: 2023 Nissan Versa ) USA battery disconnect safety kill switch Date: I have an ohmmeter - Mounting. The same store sells those wires contacts as compared to gold with a professional troubleshooting without interfering your! Times, though never had a hard time understanding whats Written in the market available all. I feel as if it will last the lifetime of my batteries on and off car secured a dryer missed... Copyright 2023 by AUTOSALES, INCORPORATED the package also comes with a lower one due higher... Check every now and then using a remote operated battery disconnect switch I the... If it still works second thoughts if its already switched on or if I battery disconnect safety kill switch a. Switch 130AH - with Pull out PIN install these switches the most economical option in the packaging before doing installation! ( 5 ), How to do things accurately first want to.! Should be using, we compromise their quality is not going to be preferred by professional racers one the! Under a Rug like best about this product is, although its rated at 180 amps continuous. Their device for a long time allows you to conduct troubleshooting without interfering your. Parts within the engine compartment you an assurance that your vehicles will start even after prolonged storage Ship:.
When Will South Carolina Receive Stimulus Checks 2022, Articles B