--- product_id: 17483206 title: "Lithium 4s 0.8A, TM-471, 8-step 12.8V 0.8A sealed battery saving charger & maintainer" brand: "optimate" price: "509.63 DT" currency: TND in_stock: true reviews_count: 13 category: "Opti Mate" url: https://www.desertcart.tn/products/17483206-lithium-4s-0-8a-tm-471-8-step-12-8v store_origin: TN region: Tunisia --- # 0.8A precise charging current 8-step lithium-specific charge cycle Integrated BMS wake-up & protection Lithium 4s 0.8A, TM-471, 8-step 12.8V 0.8A sealed battery saving charger & maintainer **Brand:** optimate **Price:** 509.63 DT **Availability:** βœ… In Stock ## Summary > πŸ”‹ Charge smarter, last longer β€” never get stranded again! ## Quick Answers - **What is this?** Lithium 4s 0.8A, TM-471, 8-step 12.8V 0.8A sealed battery saving charger & maintainer by optimate - **How much does it cost?** 509.63 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/17483206-lithium-4s-0-8a-tm-471-8-step-12-8v) ## Best For - optimate enthusiasts ## Why This Product - Trusted optimate brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Connect & Forget:** Fully automatic operation means zero babysitting, just plug in and relax - β€’ **BMS-Safe Wake Mode:** Seamlessly interfaces with battery management systems for ultimate safety - β€’ **Smart Lithium Revival:** Resurrects deeply discharged LiFePO4 batteries others give up on - β€’ **8-Step Precision Charge:** Tailored multi-stage charging optimizes battery health & longevity - β€’ **Proactive Battery Health Check:** Continuous pre/post charge testing warns you before battery failure hits ## Overview The OptiMATE Lithium 4s 0.8A TM-471 is a premium 12.8V sealed lithium battery charger and maintainer designed specifically for LiFePO4 chemistries. Featuring an 8-step charging algorithm and integrated BMS wake-up mode, it safely revives and maintains batteries that other chargers can’t. With automated testing and cell balancing, it ensures optimal battery health and longevity, making it the go-to choice for professionals who demand reliability and peace of mind. ## Description Buy OptiMATE Lithium 4s 0.8A, TM-471, 8-step 12.8V 0.8A sealed battery saving charger & maintainer: Battery Chargers - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: A no-brainer choice for accurate charging and automated testing reassurance - I also have the larger 5A Optimate lithium charger, and this one does just as well, albeit a tad slower on larger batteries due to the lower current rating - less expensive but certainly no less capable! Like all the Tecmate-Optimates, you can connect and walk away without setting anything knowing that you'll get the absolute best charge safely. Not often considered compared to other chargers is all the pre and post charge testing that gets done on a continuous basis, specific to the lithium chemistry. Something that lead-acid based chargers don't do properly with lithium. Close, but no cigar. Note that "walk away" does NOT mean leave for work or go on vacation. NO battery of any chemistry under major charge should be left unattended. Having said that, while I own and have seen the similar looking, lead-acid based "Optimate 2" do an OK job on charging lithiums due to it's overall simplicity, the lithium specific TM471 is a far better charger than the Optimate 2 for this purpose. You get lithium-specific voltage tracking, testing, low-voltage recovery, AND cell-balancing pulses near the end of charge you don't get with the lead-acid based Optimate 2. All voltages tracked accurately with my Fluke 87V monitoring the charge process, just like all my other Optimates. That's why I own more than one. :) The extensive post-charge testing (if you ALLOW it to actually do a 12 hour long-term test) can give you an indication of problems long before bike issues leave you stranded. I'm a battery geek and can quickly see through hype. No hype here. It is so refreshing to actually see a product do exactly what they say it does, and openly discuss it in the manual. Review: Flawless connect and forget charger at a great price - Charger saved the EarthX ETX680 on my Sportcruiser airplane. It was discharged to 4.1 volts and several attempts to recharge it using a couple of different EarthX approved trickle chargers failed. I tried the EarthX recommended approach of momentarily hooking a good 12 volt battery in parallel with the trickle chargers to no avail and had resigned myself to having to replace the battery. After reading the reviews, I ordered the Optimate 4s .8A charger, which was received the next morning. I love this charger. It's totally automatic. Just connect and it interfaces with the built in BMS protection circuitry on the battery and goes into Save mode if the battery is more than 50% discharged. A light tells you whether it is in Save mode, charging, or fully charged. Unfortunately, the lights are not labeled, so I used my label maker to mark them, which is no big deal. This charger just works! ## Features - Longer battery life and more battery power guaranteed. - Ultimate protection for your high-performance Lithium (LiFePO4 / LiFe / LFP) battery. - Saves dead batteries other chargers can't! - BMS (Battery Management System) wake up mode safely wakes battery with integrated BMS protection out of sleep mode. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00Y38X7WI | | Amperage | 0.8 Amps | | Best Sellers Rank | #34,668 in Automotive ( See Top 100 in Automotive ) #191 in Battery Chargers | | Brand | OptiMate | | Customer Reviews | 4.7 4.7 out of 5 stars (750) | | Date First Available | November 11, 2014 | | Exterior | Machined | | Is Discontinued By Manufacturer | No | | Item Weight | 1 pounds | | Item model number | TM-471 | | Manufacturer | OptiMate | | Manufacturer Part Number | TM-471 | | Model | Optimate | | Product Dimensions | 8 x 6 x 3 inches | | Voltage | 240 Volts | | Wattage | 15.00 | ## Product Details - **Brand:** OptiMate - **Color:** Black, Blue, Red, Silver - **Item Weight:** 16 ounces - **Output Voltage:** 12 Volts (DC) - **Product Dimensions:** 6"D x 8"W x 3"H ## Images ![Lithium 4s 0.8A, TM-471, 8-step 12.8V 0.8A sealed battery saving charger & maintainer - Image 1](https://m.media-amazon.com/images/I/81iACDxBz7L.jpg) ## Questions & Answers **Q: Capacity of my lithium battary is 100ah, if it discharge 70 %,would this charger to charge battery to full capacity?** A: Yes, provided that your battery cells are in good condition and are able to take/hold a charge, this charger will charge it to 100% **Q: Will this charge lithium iron batteries like Shorai?** A: I've been using it on my Shorai battery for about 1 year and it works Great! **Q: Can I get it with eu plug?** A: We don't offer the EU plug, but it can be used with an EU plug (100-240V). **Q: How long will it take to charge 80 as (group 27) lithium lifepo4 battery? 20 hours, or few days? thanks** A: Instructions say it will take 125% of the battery AH capacity for the battery to charge, so I assume you multiply your amp hours by 125% to get a rough estimate ## Customer Reviews ### ⭐⭐⭐⭐⭐ A no-brainer choice for accurate charging and automated testing reassurance *by I***C on January 23, 2015* I also have the larger 5A Optimate lithium charger, and this one does just as well, albeit a tad slower on larger batteries due to the lower current rating - less expensive but certainly no less capable! Like all the Tecmate-Optimates, you can connect and walk away without setting anything knowing that you'll get the absolute best charge safely. Not often considered compared to other chargers is all the pre and post charge testing that gets done on a continuous basis, specific to the lithium chemistry. Something that lead-acid based chargers don't do properly with lithium. Close, but no cigar. Note that "walk away" does NOT mean leave for work or go on vacation. NO battery of any chemistry under major charge should be left unattended. Having said that, while I own and have seen the similar looking, lead-acid based "Optimate 2" do an OK job on charging lithiums due to it's overall simplicity, the lithium specific TM471 is a far better charger than the Optimate 2 for this purpose. You get lithium-specific voltage tracking, testing, low-voltage recovery, AND cell-balancing pulses near the end of charge you don't get with the lead-acid based Optimate 2. All voltages tracked accurately with my Fluke 87V monitoring the charge process, just like all my other Optimates. That's why I own more than one. :) The extensive post-charge testing (if you ALLOW it to actually do a 12 hour long-term test) can give you an indication of problems long before bike issues leave you stranded. I'm a battery geek and can quickly see through hype. No hype here. It is so refreshing to actually see a product do exactly what they say it does, and openly discuss it in the manual. ### ⭐⭐⭐⭐⭐ Flawless connect and forget charger at a great price *by M***D on April 30, 2022* Charger saved the EarthX ETX680 on my Sportcruiser airplane. It was discharged to 4.1 volts and several attempts to recharge it using a couple of different EarthX approved trickle chargers failed. I tried the EarthX recommended approach of momentarily hooking a good 12 volt battery in parallel with the trickle chargers to no avail and had resigned myself to having to replace the battery. After reading the reviews, I ordered the Optimate 4s .8A charger, which was received the next morning. I love this charger. It's totally automatic. Just connect and it interfaces with the built in BMS protection circuitry on the battery and goes into Save mode if the battery is more than 50% discharged. A light tells you whether it is in Save mode, charging, or fully charged. Unfortunately, the lights are not labeled, so I used my label maker to mark them, which is no big deal. This charger just works! ### ⭐⭐⭐⭐⭐ Good product *by A***R on May 19, 2025* Put a lithium battery in my Kawasaki Mule; big difference in starting. Bought this to make sure it starts every time, no matter how cold or how long it has been sitting. Solid product that protects your battery investment. ## Frequently Bought Together - OptiMATE Lithium 4s 0.8A, TM-471, 8-step 12.8V 0.8A sealed battery saving charger & maintainer - Antigravity ATZ-10 Performance Lithium Motorcycle Powersport Battery with Built-In Jump Starting. 6.1Ah, Replaces YTZ10, YTZ12, YTZ14, YTX9, YTX7A Yamaha, Honda, Kawasaki, Suzuki --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/17483206-lithium-4s-0-8a-tm-471-8-step-12-8v](https://www.desertcart.tn/products/17483206-lithium-4s-0-8a-tm-471-8-step-12-8v) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-04-24*