--- product_id: 517542357 title: "12V 20Ah 30Ah 40Ah 50Ah Polymer Lithium Battery Waterproof Rechargeable Battery Pack with LCD Display for 12V Electric Motor Replacement Battery" brand: "willq" price: "¥60570" currency: JPY in_stock: true category: "Willq" url: https://www.desertcart.jp/products/517542357-12v-20ah-30ah-40ah-50ah-polymer-lithium-battery-waterproof-rechargeable store_origin: JP region: Japan --- # Fast 4-hour full charge Up to 50Ah capacity Advanced BMS safety protection 12V 20Ah 30Ah 40Ah 50Ah Polymer Lithium Battery Waterproof Rechargeable Battery Pack with LCD Display for 12V Electric Motor Replacement Battery **Brand:** willq **Price:** ¥60570 **Availability:** ✅ In Stock ## Summary > 🔋 Power your ride with confidence and style—never get left behind! ## Quick Answers - **What is this?** 12V 20Ah 30Ah 40Ah 50Ah Polymer Lithium Battery Waterproof Rechargeable Battery Pack with LCD Display for 12V Electric Motor Replacement Battery by willq - **How much does it cost?** ¥60570 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/517542357-12v-20ah-30ah-40ah-50ah-polymer-lithium-battery-waterproof-rechargeable) ## Best For - willq enthusiasts ## Why This Product - Trusted willq brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power that Lasts:** Cycle life of 500+ charges means your battery stays strong for up to 5 years. - • **Always In The Know:** Clear LCD display keeps you updated on battery power anytime, avoiding unexpected downtime. - • **Ready When You Are:** Comes with a 12.6V 2A charger for a quick 4-hour recharge—get back on the move faster. - • **Smart Safety First:** Built-in BMS shields against overcharge, short-circuit, and temperature risks for worry-free use. - • **Lightweight & Durable:** Robust ABS shell protects against drops, water, and moisture while keeping weight manageable. ## Overview This 12V polymer lithium battery pack offers a high-capacity range from 20Ah to 50Ah with a lightweight, waterproof ABS casing. Featuring a smart BMS for comprehensive safety and an LCD power indicator, it delivers up to 500 charge cycles and a lifespan of 5 years. Fast recharge in 4 hours with the included 12.6V 2A charger ensures your electric motor replacement battery is always ready to perform. ## Description Battery is equipped with a switch, which can be turned off in time without using the battery to avoid wasting power. The ABS materials shell will protect the battery from the damages of fallen or crashes, also water and moisture.Production process quality inspection and monitoring the use of computers to ensure superior battery performance.The advanced lithium-ion technology offers the highest possible charging cycles and cannot be affected by the so-called memory effect.Equipped with a smart BMS, which protects battery from over-charge, over-discharge, over-voltage, over-current, short-circuit and temperature protection to ensure the safety.Capacity: 20Ah,30Ah,40Ah,50AhInput voltage: 12.6VSize: 197*115*75mmInput current: 350ma (standard) / 1000maOutput voltage: 12.6-10.8VOutput current:1-10A(Customized)Charger input: 100-220V ACCharger output: DC 12VProduct life: Cycle charge and discharge times ≥500 times.Package include:1 X 12V DC Li-ion Battery1 X 12.6V 2A AC adapterWarm tips:Make sure you buy the suitable battery or motor kits, please check the size and the model carefully before you buy it.When the battery capacity is less than 20%, please charge in time to ensure the battery life. Need to open power switch when Charger. otherwise can't full charge. ## Features - A grade original cell.with the characteristic of long cycle life, light battery weight, high safety performance, green environmental protection, It's a much better battery than a lead-acid battery. - Equipped with BMS protection board. It has to undertake a more accurate calculation of electricity to ensure the service life of the battery, also provides safety while the battery running. - With on/off button, help you save more power. LCD power Indicator, inform you battery power in anytime.The ABS shell will protect the battery from the damages of fallen or crashes, also water and moisture. - Comes with a 12.6V 2A charger, it can be fully charge in 4 hours. Built-in high quality brand lithium cell, battery cycle life up to 500 times, life expectancy of our electric bike battery up to 5 years. - Battery Package contains 1 * 12V polyner lithium battery, 1 * 12.6V 2A Battery charger. Please fully charge before you first use. If you have any questions please contact us for help. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BYD69VBQ | | Antenna Location | Protection | | Battery Cell Type | Lithium Ion | | Best Sellers Rank | #204,287 in Electronics ( See Top 100 in Electronics ) #1,280 in Rechargeable Household Batteries | | Brand | WILLQ | | Country of Origin | China | | Item Dimensions | 19.7 x 11.5 x 7.5 centimeters | | Item Weight | 1.5 Kilograms | | Manufacturer | WILLQ | | Reusability | Rechargeable | | Unit Count | 1.00 Count | | Voltage | 12 Volts | ## Product Details - **Battery cell composition:** Lithium Ion - **Brand:** WILLQ - **Recommended uses for product:** Protection - **Unit count:** 1.00 Count - **Voltage:** 12 Volts ## Images ![12V 20Ah 30Ah 40Ah 50Ah Polymer Lithium Battery Waterproof Rechargeable Battery Pack with LCD Display for 12V Electric Motor Replacement Battery - Image 1](https://m.media-amazon.com/images/I/51lRnqJx3mL.jpg) ## Available Options This product comes in different **Color, Size** options. --- ## 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/517542357-12v-20ah-30ah-40ah-50ah-polymer-lithium-battery-waterproof-rechargeable](https://www.desertcart.jp/products/517542357-12v-20ah-30ah-40ah-50ah-polymer-lithium-battery-waterproof-rechargeable) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-24*