---
product_id: 607595193
title: "Tecmate OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green"
brand: "tecmate"
price: "HK$2384"
currency: HKD
in_stock: true
reviews_count: 7
url: https://www.desertcart.hk/products/607595193-tecmate-optimate-lithium-4s-6a-tm391-10-step-12-8v
store_origin: HK
region: Hong Kong
---

# 6A high current charge 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:** HK$2384
**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?** HK$2384 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/607595193-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 revive batteries with integrated Battery Management System protection.
- • **10-Step Smart Charging:** Experience precision with the most advanced multi-stage battery saving program.
- • **Power-Packed 6A Charging:** Maximize your lithium battery’s performance with rapid, reliable 6A current.
- • **TUNE Mode for ECU Stability:** Maintain stable battery support during critical ECU programming sessions.
- • **Weatherproof & Compact Design:** Durable, lightweight charger built for on-the-go professionals and racers.

## Overview

The Tecmate OptiMate Lithium 4s 6A is a cutting-edge 12.8V lithium battery charger designed for high-performance LiFePO4 batteries. Featuring a powerful 6A current, an advanced 10-step charging program, and integrated BMS wake-up mode, it ensures optimal battery health and longevity. Its TUNE mode supports stable ECU programming, making it the go-to choice for racers and professionals seeking reliable, weatherproof battery maintenance.

## 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: Quality - Good kit works great
Review: Optimate Lithium Battery Charger - Easy to fix up. Mounting screws used only at the top. Used existing cables from the battery just changed the dust cover. Pleased it's charging my Lithium motorcycle battery. I was gifted this. Extremely very happy.

## 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 |
| Best Sellers Rank | 300,276 in Automotive ( See Top 100 in Automotive ) 1,207 in Car Battery Charging Units |
| Brand | Tecmate |
| Colour | ['Blue'] |
| Customer Reviews | 4.8 4.8 out of 5 stars (36) |
| Date First Available | 17 Jan. 2024 |
| Guaranteed software updates until | unknown |
| Included components | Battery Charger, weatherproof battery lead & battery clip set |
| Item Weight | 9.6 Ounces |
| Item model number | TM391 |
| Package Dimensions L x W x H | 30.8 x 17.9 x 8.3 centimetres |
| Package Weight | 1.21 Kilograms |
| Part number | TM391 |
| Product Dimensions L x W x H | 22.2 x 8.9 x 6.3 centimetres |

## 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)

## Customer Reviews

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

Good kit works great

### ⭐⭐⭐⭐⭐ Optimate Lithium Battery Charger
*by A***S on 4 March 2024*

Easy to fix up. Mounting screws used only at the top. Used existing cables from the battery just changed the dust cover. Pleased it's charging my Lithium motorcycle battery. I was gifted this. Extremely very happy.

### ⭐⭐⭐⭐⭐ Review
*by D***D on 24 October 2025*

I did a lot of research and I have used many different brands of chargers. The OptiMate series of chargers can't be beat. They are the most sophisticated and problem free chargers out there. I have a number of them and they always do the job. I have even been able to bring a couple of batteries back to life. Highly recommend this product in its many superior forms.

## 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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**Shop now:** [https://www.desertcart.hk/products/607595193-tecmate-optimate-lithium-4s-6a-tm391-10-step-12-8v](https://www.desertcart.hk/products/607595193-tecmate-optimate-lithium-4s-6a-tm391-10-step-12-8v)

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-24*