---
product_id: 606566889
title: "Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green"
brand: "tecmate"
price: "£203.99"
currency: GBP
in_stock: true
reviews_count: 5
category: "Tecmate"
url: https://www.desertcart.co.uk/products/606566889-tecmate-optimate-lithium-4s-6a-tm391-10-step-12-8v
store_origin: GB
region: United Kingdom
---

# 6A high current output 10-step advanced charging BMS wake-up & protection Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green

**Brand:** tecmate
**Price:** £203.99
**Availability:** ✅ In Stock

## Summary

> 🔋 Charge smarter, race harder — never miss a beat with OptiMate Lithium 4s 6A!

## Quick Answers

- **What is this?** Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green by tecmate
- **How much does it cost?** £203.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/606566889-tecmate-optimate-lithium-4s-6a-tm391-10-step-12-8v)

## Best For

- tecmate enthusiasts

## Why This Product

- Trusted tecmate brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **BMS Wake-Up Mode:** Safely revives batteries with integrated Battery Management System protection from sleep mode.
- • **Racer-Grade Reliability:** Trusted by performance enthusiasts for robust, long-lasting battery care.
- • **Power-Packed 6A Charging:** Delivers rapid, efficient charging for your high-performance lithium batteries.
- • **TUNE Mode for ECU Stability:** Provides stable power during critical ECU programming—perfect for pros and racers.
- • **10-Step Smart Charging Program:** Ensures optimal battery health with precision multi-stage charging and maintenance.

## Overview

The Tecmate OptiMate Lithium 4s 6A is a professional-grade 12.8V lithium battery charger and maintainer featuring a powerful 6A output, an advanced 10-step charging program, and integrated BMS wake-up mode. Designed for high-performance LiFePO4 batteries in motorcycles, cars, and crafts, it also offers a specialized TUNE mode for stable ECU programming, making it the go-to choice for racers and lithium battery enthusiasts.

## Description

OptiMate Lithium 4s 6A, the advanced ‘PRO’ battery charger for the 12.8V/13.2V LiFeP04 / LFP lithium battery in your performance/race motorcycle, car or craft – The racer / dealer’s choice!

Review: Excellent - Works flawlessly with my EarthX batteries. A serious charger for the new world of Li batteries. Very robust, you get what you pay for. I would recommend to people I know but I'm the only one with the lithium batteries.
Review: Quality - Good kit works great

## Features

- More charging power and current at 6A!
- Ultimate protection for your high performance Lithium (LiFePO4 / LiFe / LFP) battery.
- Most advanced 10-step charging and battery saving program.
- BMS (Battery Management System) wake up mode safely wakes battery with integrated BMS protection out of sleep mode.
- TUNE mode provides stable battery support during ECU programming.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09Z71LQF9 |
| Amperage | 0.76 Amps |
| Best Sellers Rank | #119,184 in Automotive ( See Top 100 in Automotive ) #352 in Battery Chargers |
| Brand | Tecmate |
| Built-In Media | Battery Charger, weatherproof battery lead & battery clip set |
| Color | ['Blue'] |
| Colour | ['Blue'] |
| Compatible Devices | Lithium batteries (LiFePO4 / LiFe / LFP), specifically 12.8V/13.2V 4s batteries used in motorcycles, cars, and crafts |
| Current Rating | 6 Amps |
| Customer Reviews | 4.8 out of 5 stars 42 Reviews |
| Input Voltage | 240 Volts |
| Input voltage | 240 Volts |
| Item Type Name | Battery Charger |
| Item Weight | 9.6 Ounces |
| Item weight | 9.6 Ounces |
| Manufacturer | TecMate |
| Mfr Part Number | TM391 |
| Model Number | TM391 |
| Number of Ports | 1 |
| Output Voltage | 12.8 Volts |
| Output voltage | 12.8 Volts |
| Specification Met | ecu |
| Specification met | ecu |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Tecmate
- **Colour:** ['Blue']
- **Item weight:** 9.6 Ounces
- **Output voltage:** 12.8 Volts
- **Specification met:** ecu

## Images

![Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green - Image 1](https://m.media-amazon.com/images/I/81HNmmJBZrL.jpg)
![Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green - Image 2](https://m.media-amazon.com/images/I/814g4VWCKJL.jpg)
![Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green - Image 3](https://m.media-amazon.com/images/I/81z2yfw6OuL.jpg)
![Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green - Image 4](https://m.media-amazon.com/images/I/81-2JDpCQvL.jpg)
![Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green - Image 5](https://m.media-amazon.com/images/I/81-PLkK2Z3L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent
*by M***E on 12 February 2026*

Works flawlessly with my EarthX batteries. A serious charger for the new world of Li batteries. Very robust, you get what you pay for. I would recommend to people I know but I'm the only one with the lithium batteries.

### ⭐⭐⭐⭐⭐ Quality
*by S***S on 1 March 2025*

Good kit works great

### ⭐⭐⭐⭐⭐ Perfect, cheaper than the Motorcyle branded charger...
*by R***B on 1 March 2023*

Higher current charger enables me to reuse this for any other sized batteries I may have. BMS reset feature looks handy but have not had a chance to use it. Case seems really sturdy compared to other trickle charges I have, but they are rated 1 Amp and below...

## Frequently Bought Together

- Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green
- Optimate cable O-127 ring terminal harness with integrated battery status / charge system monitor, 12.8V / 13.2V lithium powersport, smart

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-07-26*