---
product_id: 250132075
title: "Wirthco 20090 Battery Doctor 75 Amp/100 Amp Isolator , Black"
brand: "wirthco"
price: "₨69833"
currency: LKR
in_stock: true
reviews_count: 13
category: "Wirth Co"
url: https://www.desertcart.lk/products/250132075-wirthco-20090-battery-doctor-75-amp-100-amp-isolator-black
store_origin: LK
region: Sri Lanka
---

# Priority charging for starting battery IP62 water-resistant design 100A high-capacity isolator Wirthco 20090 Battery Doctor 75 Amp/100 Amp Isolator , Black

**Brand:** wirthco
**Price:** ₨69833
**Availability:** ✅ In Stock

## Summary

> 🔋 Power up your ride with confidence—never get stranded again!

## Quick Answers

- **What is this?** Wirthco 20090 Battery Doctor 75 Amp/100 Amp Isolator , Black by wirthco
- **How much does it cost?** ₨69833 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/250132075-wirthco-20090-battery-doctor-75-amp-100-amp-isolator-black)

## 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

- • **Compact Yet Powerful:** Lightweight 454g design fits easily into your vehicle without compromising on 100 Amp capacity.
- • **Trusted by Thousands:** Rated 4.4 stars by over 800 users, a proven choice for professional-grade battery isolation.
- • **Manual Override Control:** Take charge with a manual override feature to start your vehicle battery anytime, anywhere.
- • **Built to Brave the Elements:** IP62 water-resistant rating ensures reliable performance even in wet or dusty conditions.
- • **Seamless Dual Battery Management:** Automatically charges your auxiliary battery while prioritizing the starter battery for uninterrupted power.

## Overview

The Wirthco 20090 Battery Doctor is a robust 100 Amp battery isolator designed for efficient dual battery management. Featuring IP62 water resistance, it prioritizes charging your starting battery while automatically maintaining your auxiliary battery. Its manual override ensures you can start your vehicle in any situation, making it an essential upgrade for reliable automotive power management.

## Description

Buy Wirthco 20090 Battery Doctor 75 Amp/100 Amp Isolator , Black online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Battery adupter - Good product and useful
Review: هذا المنظم تستطيع أن تقوم بتركيببه لوحدك حيث أنه ينظم الشاحن بين البطارية الرئيسية والبطارية الإضافية وله ميزات أخرى

## Features

- Water-Resistant (Ip62)
- Manual Override For Starting Battery
- Priority Charging For Starting Battery
- Automatically Charges Auxiliary Battery

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004QCDE9M |
| Amperage | 100 Amps |
| Best Sellers Rank | #4,498 in Automotive ( See Top 100 in Automotive ) #19 in Battery Chargers |
| Brand | WirthCo |
| Customer Reviews | 4.4 4.4 out of 5 stars (832) |
| Date First Available | 29 November 2012 |
| Item Weight | 454 g |
| Item model number | 20090 |
| Manufacturer | Battery Doctor |
| Manufacturer Part Number | 20090 |
| Model | Battery Isolator, 100A |
| OEM Part Number | 20090 |
| Product Dimensions | 26.67 x 17.02 x 5.84 cm; 453.59 g |
| Safety Rating | Não Aplicável |
| Voltage | 12 Volts |

## Product Details

- **Brand:** WirthCo
- **Color:** Black
- **Product Dimensions:** 6.7"D x 10.5"W x 2.3"H
- **Item Weight:** 1 Pounds
- **Output Voltage:** 2.4E+2 Volts

## Images

![Wirthco 20090 Battery Doctor 75 Amp/100 Amp Isolator , Black - Image 1](https://m.media-amazon.com/images/I/81y8seYSjcL.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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Battery adupter
*by S***I on 23 January 2026*

Good product and useful

### ⭐⭐⭐⭐⭐ Review
*by R***D on 15 May 2024*

هذا المنظم تستطيع أن تقوم بتركيببه لوحدك حيث أنه ينظم الشاحن بين البطارية الرئيسية والبطارية الإضافية وله ميزات أخرى

### ⭐⭐⭐⭐⭐ Review
*by K***D on 21 November 2023*

ممتاز

## Frequently Bought Together

- WirthCo 20090 Battery Doctor 75 Amp/100 Amp Battery Isolator , Black
- NOCO GENIUS2D: 2A 12V Smart Onboard Battery Charger - Direct-Mount Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – For Lead-Acid Batteries
- NOCO GCP1 15A AC Port Plug, 125V Power Inlet Socket, and Waterproof Electrical Outlet Receptacle Box with 16-Inch Integrated Outdoor Extension Cord

---

## 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.lk/products/250132075-wirthco-20090-battery-doctor-75-amp-100-amp-isolator-black](https://www.desertcart.lk/products/250132075-wirthco-20090-battery-doctor-75-amp-100-amp-isolator-black)

---

*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-21*