---
product_id: 606566889
title: "OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green"
brand: "tecmate"
price: "$8742"
currency: MXN
in_stock: true
reviews_count: 5
category: "Tecmate"
url: https://www.desertcart.mx/products/606566889-optimate-lithium-4s-6a-tm391-10-step-12-8v-6a
store_origin: MX
region: Mexico
---

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

**Brand:** tecmate
**Price:** $8742
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 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?** $8742 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/606566889-optimate-lithium-4s-6a-tm391-10-step-12-8v-6a)

## 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—no more dead starts.
- • **10-Step Smart Charging:** Experience the most advanced, precision-controlled battery care for longevity and peak power.
- • **Race-Ready Reliability:** Trusted by racers and dealers alike for high-performance lithium battery maintenance.
- • **Power-Packed 6A Charging:** Maximize your lithium battery’s performance with rapid, reliable 6A current.
- • **TUNE Mode for ECU Stability:** Keep your battery stable during critical ECU programming—engineered for pros.

## Overview

The Tecmate OptiMate Lithium 4s 6A is a cutting-edge 12.8V lithium battery charger and maintainer featuring a powerful 6A current, a sophisticated 10-step charging program, and integrated BMS wake-up mode. Designed for high-performance LiFePO4 batteries, it ensures ultimate protection and stable support during ECU programming, making it the go-to choice for professional racers and 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: 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.
Review: 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 |
| Best Sellers Rank | #77,570 in Automotive ( See Top 100 in Automotive ) #262 in Battery Chargers |
| Item model number | TM391 |
| Manufacturer | TecMate |
| Product Dimensions | 22.2 x 8.9 x 6.3 cm; 272.16 g |

## Product Details

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

## Images

![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

### ⭐⭐⭐⭐⭐ 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.

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

Good kit works great

### ⭐⭐⭐⭐⭐ Review
*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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**Shop now:** [https://www.desertcart.mx/products/606566889-optimate-lithium-4s-6a-tm391-10-step-12-8v-6a](https://www.desertcart.mx/products/606566889-optimate-lithium-4s-6a-tm391-10-step-12-8v-6a)

---

*Product available on Desertcart Mexico*
*Store origin: MX*
*Last updated: 2026-01-31*