--- product_id: 607595193 title: "OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green" brand: "tecmate" price: "¥61595" currency: JPY in_stock: true reviews_count: 7 category: "Tecmate" url: https://www.desertcart.jp/products/607595193-optimate-lithium-4s-6a-tm391-10-step-12-8v-6a store_origin: JP region: Japan --- # 6A high current output 10-step advanced charging BMS wake-up & protection OptiMate Lithium 4s 6A, TM391, 10-step 12.8V 6A Lithium Expert Battery Saving Charger & Maintainer, Blue/Green **Brand:** tecmate **Price:** ¥61595 **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?** ¥61595 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/607595193-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 revives batteries with integrated Battery Management System protection. - • **10-Step Smart Charging:** Ensures optimal battery health with a precision-engineered multi-stage program. - • **Power-Packed 6A Charging:** Delivers rapid, efficient charging for your high-performance lithium batteries. - • **TUNE Mode for ECU Stability:** Provides steady power during critical ECU programming—no interruptions, no worries. - • **Weatherproof & Compact Design:** Durable, lightweight charger built to withstand the elements and fit seamlessly in your gear. ## Overview The Tecmate OptiMate Lithium 4s 6A is a professional-grade 12.8V lithium battery charger and maintainer designed for high-performance LiFePO4 batteries. Featuring a powerful 6A output, an advanced 10-step charging program, and integrated BMS wake-up mode, it ensures safe, efficient charging and battery longevity. Its TUNE mode supports stable ECU programming, making it the go-to choice for racers and vehicle enthusiasts seeking reliable battery care. ## 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 | | Amperage | 0.76 Amps | | Best Sellers Rank | 415,526 in Automotive ( See Top 100 in Automotive ) 1,384 in Car Battery Charging Units | | Box Contents | Battery Charger, weatherproof battery lead & battery clip set | | Brand | Tecmate | | Brand Name | Tecmate | | Colour | ['Blue'] | | Compatible Devices | motorcycle, truck, car, vehicle | | Current Rating | 6 Amps | | Customer Reviews | 4.8 out of 5 stars 43 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 | | Manufacturer Part Number | TM391 | | Model Number | TM391 | | Number of Items | 1 | | Number of Ports | 1 | | Output Voltage | 12.8 Volts | | Output voltage | 12.8 Volts | | Specification Met | ecu | | Specification met | ecu | | Unit Count | 1.0 count | ## 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 ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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. ## 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 --- ## 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.jp/products/607595193-optimate-lithium-4s-6a-tm391-10-step-12-8v-6a](https://www.desertcart.jp/products/607595193-optimate-lithium-4s-6a-tm391-10-step-12-8v-6a) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-27*