Used - Smart BMS 4S 12V 120A Lithium Lifepo4 Battery Management with Balance Leads and Wireless Bluetooth Module - 4 Cells 12.8 Volts DIY Programmable

Bench tested and verified. 4 cell, 12v volt Lithium Lifepo4 DIY batteries 120 amp continuous charge or discharge current Low Temperature Charging cutoff Programmable with IOS app, Android app, or Desktop app Includes Bluetooth module for wireless app connections Free USPS Priority shipping JBD-SP04S020 It is an intelligent protection board scheme specially designed for 4 series battery packs of start-up battery and electric energy storage products. It is suitable for lithium batteries with different chemical properties, such as lithium ion, lithium polymer, lithium iron phosphate, etc. The protection board has strong load carrying capacity and the maximum continuous discharge current can reach 120A. ● 4 cell series protection ● Various protection functions for charging and discharging ● Discharge over current, short circuit protection functional processes of hardware ● Over voltage, under voltage, temperature and overload protection function processing of software ● Accurate SOC calculation with automatic SOC learning function ● Reserved RS485, CANBUS communication ● UART communication function, can read all data of battery in real time and upgrade online ● Very low static current consumption ● The reserved switch controls the output of protection board * Desktop App requires UART USB module. Not Included. Fully Programmable Smart BMS with Bluetooth with Android or iPhone App. The charge and discharge using the same port. Smart BMS is designed for 4 series (4S 12V) Lithium (L Sold on RadioB Tech (https://radiobtech.com/products/copy-of-smart-bms-4s-12v-120a-lithium-lifepo4-battery-management-with-balance-leads-and-wireless-bluetooth-module-4-cells-12-8-volts-diy-programmable). The price shown is the retail price on that storefront on 2026-10-27, not a GreenB2B quote or a wholesale price.