---
product_id: 52161167
title: "WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black"
brand: "wirthco"
price: "$360.78"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/52161167-wirthco-1213-1241-20092-battery-doctor-125-amp-150-amp
store_origin: US
region: United States of America
---

# 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:** $360.78
**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?** $360.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/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.

## 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/81msuQ3BxKL.jpg)
![WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black - Image 2](https://m.media-amazon.com/images/I/81buYNhuqlL.jpg)
![WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black - Image 3](https://m.media-amazon.com/images/I/61sdw8j-xHL.jpg)
![WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black - Image 4](https://m.media-amazon.com/images/I/71BoBxqrwQL.jpg)
![WirthCo 1213.1241 20092 Battery Doctor 125 Amp/150 Amp Battery Isolator, Black - Image 5](https://m.media-amazon.com/images/I/51mq+S789LL.jpg)

## Available Options

This product comes in different **Size** options.

## 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.

## Frequently Bought Together

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-27*