--- product_id: 467969902 title: "NERMAK 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, Lighting, Outdoor camping, Power Wheels, Fish Finder, Built-in 20A BMS" brand: "nermak" price: "S$141" currency: SGD in_stock: true reviews_count: 8 category: "Nermak" url: https://www.desertcart.sg/products/467969902-nermak-12v-20ah-lithium-lifepo4-deep-cycle-battery-2000-cycles store_origin: SG region: Singapore --- # 20A continuous discharge 2000+ cycles lifespan Only 4.3 lbs lightweight NERMAK 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, Lighting, Outdoor camping, Power Wheels, Fish Finder, Built-in 20A BMS **Brand:** nermak **Price:** S$141 **Availability:** ✅ In Stock ## Summary > 🔋 Power up smarter, not heavier — the future of portable energy is here! ## Quick Answers - **What is this?** NERMAK 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, Lighting, Outdoor camping, Power Wheels, Fish Finder, Built-in 20A BMS by nermak - **How much does it cost?** S$141 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/467969902-nermak-12v-20ah-lithium-lifepo4-deep-cycle-battery-2000-cycles) ## Best For - nermak enthusiasts ## Why This Product - Trusted nermak brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built-In Brain:** Advanced 20A BMS safeguards against overcharge, over-discharge, and short circuits for worry-free use. - • **Powerhouse Output:** Robust 20A continuous discharge supports demanding tools and devices effortlessly. - • **Endurance Champion:** Over 2000 deep cycles for years of reliable power without degradation. - • **Featherweight Energy:** At just 4.3 lbs, it’s 1/3 the weight of traditional lead-acid batteries—portable power redefined. - • **Versatile & Expandable:** Connect up to 4 batteries in series or parallel for scalable power solutions tailored to your needs. ## Overview The NERMAK 12V 20Ah LiFePO4 Deep Cycle Battery delivers a cutting-edge lithium iron phosphate chemistry with an ultra-long 2000+ cycle life and a featherlight 4.3-pound frame. Featuring a built-in 20A Battery Management System, it ensures top-tier safety and performance for solar setups, outdoor adventures, and high-demand tools. Its stable 12.8V output and expandable design make it the go-to upgrade for professionals seeking reliable, lightweight, and scalable power solutions. ## Description desertcart.com: NERMAK 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, Lighting, Outdoor camping, Power Wheels, Fish Finder, Built-in 20A BMS : Automotive Review: Phenomenal power-to-weight ratio and a robust 20A BMS—excellent workshop battery upgrade! - I picked up this NERMAK 12V 20Ah LiFePO4 Deep Cycle Battery to build out a custom, mobile 12V auxiliary power pack for my outdoor shop tools and high-flow pressure washer supply pumps. To handle outdoor overspray and demanding start-up currents safely, I paired this battery directly with the 12 AWG marine-grade waterproof fuse holders I reviewed previously. This setup has operated flawlessly, proving to be a highly efficient, lightweight power source that works just fine under continuous workshop load. Why this LiFePO4 battery is an exceptional energy upgrade: Shockingly Lightweight Footprint: If you are used to lugging around old-school 12V sealed lead-acid (SLA) batteries, switching to lithium iron phosphate is a total revelation. This 20Ah pack delivers twice the usable energy capacity of a comparable SLA battery at a tiny fraction of the physical weight, making it incredibly easy to integrate into a mobile tool carriage or camping rig. Dependable 20A Built-In BMS Protection: The integrated Battery Management System (BMS) is excellently calibrated. It monitors cell balance and protects against short circuits, over-charging, and deep over-discharging. It handles the continuous high-amperage current draw of my auxiliary water pumps with zero voltage sag, clicking off instantly only during genuine over-current thresholds to protect the internal cells. Flat Voltage Discharge Curve: Unlike lead-acid cells that suffer from constant voltage drops as they deplete, this LiFePO4 battery maintains a rock-solid, steady 12.8V output through nearly 90% of its discharge capacity, keeping connected pumps running at maximum efficiency right until the pack is empty. Workshop Wiring & Charging Tips: Always Pair with Circuit Safety: Because lithium batteries can discharge energy incredibly fast during a dead short, do not wire them raw. Follow my previous build steps and splice a dedicated in-line fuse holder (equipped with a 20A fuse to match the BMS ceiling) directly onto the positive lead wire right at the terminal. Utilize a Dedicated LiFePO4 Charger: Do not attempt to charge this with a legacy automotive lead-acid battery tender. Lithium chemistry requires a specific multi-stage charging algorithm (typically pushing a bulk charge up to 14.4V–14.6V) to properly balance the internal cells and hit that advertised 2000+ cycle lifespan. The big takeaway: NERMAK has delivered a premier, ruggedly housed power cell that offers an unbeatable combination of capacity density and safety features for a very reasonable price. The screw-down terminal posts are clean and provide a rock-solid mechanical connection point, the internal protection circuits are highly responsive, and the weight savings are massive. It is an exceptional value purchase that modernizes any custom low-voltage electrical build. Review: Works great! - I needed replacement battery for my Tzora electric scooter, and the 25 AH lead acid battery pack. This barely fit into the enclosure of the lead acid battery, I had to modify it somewhat, so I could not recommend it for that use. In other scooters, it should fit great. If you are handy with tools, then it might work great for you as well. It seems to offer a higher voltage than the 25 AH lead acid battery, the voltage always reads top of the range in the volt meter. It does not sag as much when going up a incline. It feels more powerful than the 25 AH battery it replaced. But it also has the problem of shutting off when the voltage is low, not just slowing to a crawl when the voltage is low like a lead acid battery. It is a safety feature of all lithium battery packs to shut themselves off at a low voltage cut out. Just be sure to recharge it more often. I would expect a longer range than the 25 AH lead acid battery, and many more recharges than lead acid style battery. ## Features - 【Superior Performance】: Lithium iron phosphate battery has high energy density, Long cycle life, Good safety performance, No memory effect, etc. NERMAK LiFePO4 battery has built-in BMS protection to prevent overcharge, Over-discharge, Over-current and short circuit, and excessive low self-discharge rate ensuring up to 1-year maintenance-free storage. - 【Long life & light weight】: 2000+ cycles of lithium-ion batteries are no problem, while traditional lead-acid batteries only have 200-500 cycles. The battery does not contain acid, which is safer and more environmentally friendly than lead-acid batteries. Our lithium iron phosphate battery weighs only 5.5 pounds, which is only 1/3 of the weight of a lead-acid battery. - 【Widely Uses】: Widely uses in most areas such as: Lighting (LED strip etc), 12V router, RV/outdoor camping, Fish finder, Backup power, Tool trailer,Off-Grid applications, Solar/Wind power and more... - 【Expansion and Recharge】Can be connected in series or parallel, in series, Up to 4 identical batteries can be connected，Quick charge by 12A , and heavy-duty output discharge up to 20A continuous and 3C Pulse. - 【Warm Note】: 1* 12.8V 20Ah Replacement lithium ion battery，12 months warranty, If you have any question for our product, Contact us: click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller" (please use LiFePo4 special charger, with fully automatic SLA charger may not be fully charged) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B6ZBZ8T7 | | Battery Capacity | 20 amp_hours | | Battery Cell Composition | Lithium-Phosphate | | Battery Type | Lithium-Phosphate | | Best Sellers Rank | #13,568 in Health & Household ( See Top 100 in Health & Household ) #16 in 12V Batteries | | Brand | NERMAK | | Brand Name | NERMAK | | Compatible with Vehicle Type | Fish Finders, Ride-on Toys, Camping, Power wheel | | Customer Reviews | 3.9 out of 5 stars 256 Reviews | | Included Components | 1*12.8V 20Ah LiFePO4 battery | | Item Dimensions D x W x H | 7.15"D x 3.03"W x 6.69"H | | Item Weight | 4.3 pounds | | Manufacturer | Huizhou Yu'an Technology Co., Ltd. | | Manufacturer Part Number | 12V 20Ah | | Manufacturer Warranty Description | 1 year | | Model Number | 12V20A | | Size | 12V 20Ah | | Terminal | Screw Terminal | | Unit Count | 1 Count | | Vehicle Service Type | Fish Finders, Ride-on Toys, Camping, Power wheel | | Voltage | 12.8 volts | ## Product Details - **Battery Capacity:** 20 Amp Hours - **Battery Cell Composition:** Lithium-Phosphate - **Brand:** NERMAK - **Item Weight:** 4.3 Pounds - **Product Dimensions:** 7.15"D x 3.03"W x 6.69"H - **Size:** 12V 20Ah - **Terminal:** Screw Terminal - **Unit Count:** 1.0 Count - **Vehicle Service Type:** Fish Finders, Ride-on Toys, Camping, Power wheel - **Voltage:** 12.8 Volts ## Images ![NERMAK 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, Lighting, Outdoor camping, Power Wheels, Fish Finder, Built-in 20A BMS - Image 1](https://m.media-amazon.com/images/I/61gKaVQ5ssL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Phenomenal power-to-weight ratio and a robust 20A BMS—excellent workshop battery upgrade! *by J***. on June 3, 2026* I picked up this NERMAK 12V 20Ah LiFePO4 Deep Cycle Battery to build out a custom, mobile 12V auxiliary power pack for my outdoor shop tools and high-flow pressure washer supply pumps. To handle outdoor overspray and demanding start-up currents safely, I paired this battery directly with the 12 AWG marine-grade waterproof fuse holders I reviewed previously. This setup has operated flawlessly, proving to be a highly efficient, lightweight power source that works just fine under continuous workshop load. Why this LiFePO4 battery is an exceptional energy upgrade: Shockingly Lightweight Footprint: If you are used to lugging around old-school 12V sealed lead-acid (SLA) batteries, switching to lithium iron phosphate is a total revelation. This 20Ah pack delivers twice the usable energy capacity of a comparable SLA battery at a tiny fraction of the physical weight, making it incredibly easy to integrate into a mobile tool carriage or camping rig. Dependable 20A Built-In BMS Protection: The integrated Battery Management System (BMS) is excellently calibrated. It monitors cell balance and protects against short circuits, over-charging, and deep over-discharging. It handles the continuous high-amperage current draw of my auxiliary water pumps with zero voltage sag, clicking off instantly only during genuine over-current thresholds to protect the internal cells. Flat Voltage Discharge Curve: Unlike lead-acid cells that suffer from constant voltage drops as they deplete, this LiFePO4 battery maintains a rock-solid, steady 12.8V output through nearly 90% of its discharge capacity, keeping connected pumps running at maximum efficiency right until the pack is empty. Workshop Wiring & Charging Tips: Always Pair with Circuit Safety: Because lithium batteries can discharge energy incredibly fast during a dead short, do not wire them raw. Follow my previous build steps and splice a dedicated in-line fuse holder (equipped with a 20A fuse to match the BMS ceiling) directly onto the positive lead wire right at the terminal. Utilize a Dedicated LiFePO4 Charger: Do not attempt to charge this with a legacy automotive lead-acid battery tender. Lithium chemistry requires a specific multi-stage charging algorithm (typically pushing a bulk charge up to 14.4V–14.6V) to properly balance the internal cells and hit that advertised 2000+ cycle lifespan. The big takeaway: NERMAK has delivered a premier, ruggedly housed power cell that offers an unbeatable combination of capacity density and safety features for a very reasonable price. The screw-down terminal posts are clean and provide a rock-solid mechanical connection point, the internal protection circuits are highly responsive, and the weight savings are massive. It is an exceptional value purchase that modernizes any custom low-voltage electrical build. ### ⭐⭐⭐⭐⭐ Works great! *by G***C on May 11, 2026* I needed replacement battery for my Tzora electric scooter, and the 25 AH lead acid battery pack. This barely fit into the enclosure of the lead acid battery, I had to modify it somewhat, so I could not recommend it for that use. In other scooters, it should fit great. If you are handy with tools, then it might work great for you as well. It seems to offer a higher voltage than the 25 AH lead acid battery, the voltage always reads top of the range in the volt meter. It does not sag as much when going up a incline. It feels more powerful than the 25 AH battery it replaced. But it also has the problem of shutting off when the voltage is low, not just slowing to a crawl when the voltage is low like a lead acid battery. It is a safety feature of all lithium battery packs to shut themselves off at a low voltage cut out. Just be sure to recharge it more often. I would expect a longer range than the 25 AH lead acid battery, and many more recharges than lead acid style battery. ### ⭐ Battery DOA *by K***R on March 18, 2026* Battery arrived dead. Bought a charger just for this battery. Charger indicated it was charged. I'm taking time it camping and tested it as I'm about to leave. It's dead and will not charge at all. I wasted money on a bad battery and a charger I no longer need. ## Frequently Bought Together - NERMAK 12V 20Ah Lithium LiFePO4 Deep Cycle Battery, 2000+ Cycles Lithium Iron Phosphate Rechargeable Battery for Solar Power, Lighting, Outdoor camping, Power Wheels, Fish Finder, Built-in 20A BMS - ULTRAPOWER 4-Amp 14.6 Volt LiFePO4 Battery Charger,12.8 Volt LiPO Lithium Battery Charger,Smart Charger Maintainer for Cars,Motocycles,Golf Carts,UAV,Fishing Boat and Deep Cycle Batteries. --- ## 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.sg/products/467969902-nermak-12v-20ah-lithium-lifepo4-deep-cycle-battery-2000-cycles](https://www.desertcart.sg/products/467969902-nermak-12v-20ah-lithium-lifepo4-deep-cycle-battery-2000-cycles) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-08-04*