--- product_id: 52161167 title: "WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black" brand: "wirthco" price: "1037.80 DT" currency: TND in_stock: true reviews_count: 5 category: "Wirth Co" url: https://www.desertcart.tn/products/52161167-wirthco-1213-1241-20092-battery-doctor-125-amp-150-amp store_origin: TN region: Tunisia --- # 125/150 Amp capacity Water resistant (IP62) 12V battery support WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black **Brand:** wirthco **Price:** 1037.80 DT **Availability:** ✅ In Stock ## Summary > 🔋 Power Up Your Adventure! ## Quick Answers - **What is this?** WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black by wirthco - **How much does it cost?** 1037.80 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/52161167-wirthco-1213-1241-20092-battery-doctor-125-amp-150-amp) ## Best For - wirthco enthusiasts ## Why This Product - Trusted wirthco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **🌊 Marine Ready:** Water resistant design makes it perfect for marine applications. - • **🔌 Smart Charging:** Automatically charges auxiliary battery for seamless power management. - • **⚙️ Manual Override:** Easily switch to starting battery with a manual override feature. - • **🚀 Priority Charging:** Prioritizes starting battery to ensure your vehicle is always ready to go. - • **🛡️ Surge Protection:** Over current and surge protection ensures safety for electronic systems. ## Overview The WirthCo 1213.1241 Battery Doctor is a robust battery isolator designed for both marine and automotive use, featuring a water-resistant design, priority charging capabilities, and comprehensive surge protection, ensuring your vehicle's electronic systems remain safe and functional. ## Description WirthCo Battery Doctor Battery Isolator - 125/150 peak amperes is a state-of-the-art, fully automatic, dual battery controller that is suitable for any vehicle with an auxiliary battery. Smaller and lighter than other standard battery isolators, the battery isolator employs electronic switching control technology. High-performance electronic isolator allows you to charge two batteries from a single alternator, and keeps the starting battery isolated from the second battery. Also, with a single push of the override/reset button, you can change the batteries to parallel mode for jump-starting. This is water resistant; making it suitable for marine use (IP62). It includes a mounting bracket and over-current and surge protected for vehicles with electronic systems. For over 30 years, WirthCo has been a prime manufacturer of practical products for making life easier and safer. California Prop 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Review: Blue charging light never came on, returning product. - No Luck so far making this device operate. I have a 1971 VW Bus and wanted a aux battery for accessories without draining the starter battery. Installation was easy and followed very easily. I have a 7 month old starter battery. Once I hooked in a ground wire from the aux battery to the frame the red blinking light turned solid red as stated in the instructions. I start the vehicle and the blue charging light never came on. Thought, well I will drive around and see what happens. I found out that my starter battery kept draining while the aux batter remained charged...but still no blue light.Basically it has killed my (fairly new) starter battery and I got it replaced - did find out on numerous occasions that the jumpstart feature works GREAT!!! New starter battery in, same thing exactly as written above. Back to square one. Called tech support, "Tim" was very helpful and said it may be that the circuit board is defective and to return it. I did and waiting on a replacement. I hope it works, but the new starter battery has probably suffered some damage from being discharged frequently. Tech support also mentioned that the unit will not work on a positive grounded vehicle and suggested that may be my issue. No, the VW Bus has a negative ground system....but people who may have a European car that has a positive ground system, this will not work. I will update once I get the replacement, but just don't think it is going to work but hoping for the best. The instructions said it goes into charging mode when the starter battery is above 13.4v....well, that is probably the problem as even the starter battery read 12.8 volts BRAND NEW. Not too sure how to get it up to 13.4? Really disappointed this did not work for me so far and caused a lot of troubles along the way. Looks like many people had a good experience. ****UPDATE**** Batteries, mostly the starter battery was low. Decided to put it on a charger while still in the vehicle. Next morning to my surprise the blue LED light was on! Turns out it is working properly, I was just not getting the proper voltage due to a pre-existing alternator condition. Got the alternator wiring corrected and this product works as described and like a champ! Review: جيد جداً. - يتركب بين البطاريتين نفس عازل السنيدي ورفيق الدرب وبسعر افضل. يفصل بين البطاريتين اول ماينزل مستوى البطارية الأساسية وفيه ازرار لشحن البطارة الأساسية من الإضافية له خمسة أشهر راكب على السيارة والحمد لله بدون ملاحظات ## Features - Water resistant (IP62) - suitable for marine use - Priority charging for starting battery - Automatically charges auxiliary battery - Manual override for starting battery - Over current and surge protected for vehicles with electronic systems ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | WirthCo | | Brand | WirthCo | | Product Dimensions | 12.95 x 14.48 x 5.84 cm; 430.91 g | | Item model number | 1213.1241 | | Manufacturer part number | 010054200929 | | OEM Part Number | 20092 | | Amperage | 150 Amps | | Voltage | 12 Volts | | Item Weight | 431 g | ## Images ![WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black - Image 1](https://m.media-amazon.com/images/I/51m05s1r5gL.jpg) ## Questions & Answers **Q: Can this be connected to a car battery then to a lithium battery pack for the purpose of keeping the lithium’s charged? Lithium for car amps** A: No. Lithium batterie$ need a $pecific charge controller. ($$$) **Q: does the blue light stay on** A: The blue light indicates that the primary battery is connected to the alternate battery and charging. This happens when (1) the vehicle's ignition is on and (2) the primary battery is being measured at 14V or higher. Also, after turning off the ignition there is a delay of less than a minute before the batteries are isolated. The blue light will remain on until completed **Q: i bought this three months ago. the battery continues to drain. always stays at 11.7 v. i dont know if thing is broken or what. what do i do?** A: I would not continue to let the batteries drain to 11.7 Volts. Never let you battery bank get lower then 11.9 Volts. I would replace your battery isolator. **Q: Can I use this with a 200 amp alternator or will it hurt the unit** A: This unto will work fine. Your alternator may be rated for 200 amps. That rating is right before is burns up. There are other loads in your car that will take power while it is running. There is no way your alternator will push 200 amps to your battery. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Blue charging light never came on, returning product. *by N***. on 22 April 2018* No Luck so far making this device operate. I have a 1971 VW Bus and wanted a aux battery for accessories without draining the starter battery. Installation was easy and followed very easily. I have a 7 month old starter battery. Once I hooked in a ground wire from the aux battery to the frame the red blinking light turned solid red as stated in the instructions. I start the vehicle and the blue charging light never came on. Thought, well I will drive around and see what happens. I found out that my starter battery kept draining while the aux batter remained charged...but still no blue light.Basically it has killed my (fairly new) starter battery and I got it replaced - did find out on numerous occasions that the jumpstart feature works GREAT!!! New starter battery in, same thing exactly as written above. Back to square one. Called tech support, "Tim" was very helpful and said it may be that the circuit board is defective and to return it. I did and waiting on a replacement. I hope it works, but the new starter battery has probably suffered some damage from being discharged frequently. Tech support also mentioned that the unit will not work on a positive grounded vehicle and suggested that may be my issue. No, the VW Bus has a negative ground system....but people who may have a European car that has a positive ground system, this will not work. I will update once I get the replacement, but just don't think it is going to work but hoping for the best. The instructions said it goes into charging mode when the starter battery is above 13.4v....well, that is probably the problem as even the starter battery read 12.8 volts BRAND NEW. Not too sure how to get it up to 13.4? Really disappointed this did not work for me so far and caused a lot of troubles along the way. Looks like many people had a good experience. ****UPDATE**** Batteries, mostly the starter battery was low. Decided to put it on a charger while still in the vehicle. Next morning to my surprise the blue LED light was on! Turns out it is working properly, I was just not getting the proper voltage due to a pre-existing alternator condition. Got the alternator wiring corrected and this product works as described and like a champ! ### ⭐⭐⭐⭐ جيد جداً. *by M***I on 2 August 2022* يتركب بين البطاريتين نفس عازل السنيدي ورفيق الدرب وبسعر افضل. يفصل بين البطاريتين اول ماينزل مستوى البطارية الأساسية وفيه ازرار لشحن البطارة الأساسية من الإضافية له خمسة أشهر راكب على السيارة والحمد لله بدون ملاحظات ### ⭐⭐⭐⭐⭐ Battery adupter *by S***I on 23 January 2026* Good product and useful ## Frequently Bought Together - WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator , Black - TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing - Hamolar 3 Pack Car Audio 150 Amp Resettable Fuse Circuit Breaker Car Protect for Audio System Fuse 12-48V DC for Car Audio Amps Overload Protection Fuse --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/52161167-wirthco-1213-1241-20092-battery-doctor-125-amp-150-amp](https://www.desertcart.tn/products/52161167-wirthco-1213-1241-20092-battery-doctor-125-amp-150-amp) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-09-24*