Product Name: 12V 50ah 4s Lithium Ion Batteries for SLA Lead Acid Battery Replacment Model NO.: SMT-LFP12V50AH Certification: ISO9001 BMS Dimension: Three Models for Option as Below Max.Cont. Discharge Current: 50A Solution 1 (Communication): PCM-L04s70-E71, L150*W90*T10mm Solution 2 (Communication): PCM-L04s90-E12, L185*W96*T10mm Solution 3 ( Normal): PCM-L04s40-C15,a-1 , L120*W63*T10mm Charge&Discharge: Share a Same Port Communications Type: Canbus/I2c Bus/RS232/RS485/Bluetooth Connect with Bluetooth: to Read Battery Data on APP Connect with PC: to Read Battery Data Muliti-Function: Support 4-5 Battery Packs Connected in Series Delivery Time: 15-20 Working Days Trademark: SmarTEC Transport Package: Carton Specification: For Li-ion/LiFePO4 battery Origin: Shenzhen Product Description Product Features:1. Have the Basic Functions of a normal battery protection circuit:2.Have more Intelligent functions to monitor the batteries :Howto produce? PCM/BMS Production Line Battery Pack Assembly Line Certificates: who we are? A great Team to support you high quality products, fast delivery time, good after-sales services!