Features 1、Overcharge, over discharge, over current, short circuit protection 2、 25A W/Balance PCB Board 3、plate low temperature coefficient, design, fine workmanship, testing and comprehensive 4、ensure the absolute safety and reliability of the battery pack 5、Compact, suitable for many of the requirements of highly integrated Specification Specifications: Size: about 61mm*45mm Maximum operating current: 0-25A Maximum transient current: 34-40A Quiescent current: less than 30uA Internal resistance: less than 100mΩ Working temperature: -40---+50℃ Storage condition: -40-- +80℃ Effective life: more than30000h Short circuit protection: Yes, delayed self recovery Size: about 61mm*45mm Weight :12g Precautions: Strictly according to the diagram wiring: 0V(B-)3.7V(B1)7.4V(B2)11.1V(B+), Do not deliberately short circuit. After the line is connected, Need to charge first, then have output. Do not mix the good battery and the battery. The capacity of the battery internal resistance is closer will be better. Attention: Do not mix the good battery and poor battery to use. The internal resistance of 3 battery capacity are closer will be better. Please buyers know the professional knowledge of this module before buying Note: 1.Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully. 2.Please allow 1-3mm differs due to manual measurement. 3.Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same 4.The protection board can not be used for lithium iron phosphate battery, hernia lamp, hand drill battery pack, can not be used for electric fish machine battery pack, electric bicycle battery pack, children's car battery, 775 (4A) motor, 1W fish eye LED light Package Included: 1PC X PCB Protection Board Package List