Specifications:_x000D_ _x000D_ Size: about 61mm*45mm_x000D_ Over voltage range: 4.25-4.35v0.05v_x000D_ Over discharge voltage range: 2.3-3.0v0.05v_x000D_ Maximum operating current: 0-25A_x000D_ Maximum transient current: 34-40A_x000D_ Quiescent current: less than 30uA_x000D_ Internal resistance: less than 100m_x000D_ Working temperature: -40---+50_x000D_ Storage condition: -40-- +80_x000D_ Effective life: more than30000h_x000D_ _x000D_ Short circuit protection: Yes, delayed self recovery _x000D_ Size: about 61mm*45mm_x000D_ _x000D_ Weight :12g _x000D_ _x000D_ _x000D_ Precautions: _x000D_ Strictly according to the diagram wiring: 0V(B-)3.7V(B1)7.4V(B2)11.1V(B+), Do not deliberately short circuit._x000D_ After the line is connected, Need to charge first, then have output._x000D_ When the battery is connected in series with 3 groups, Please ensure that the voltage of each battery is the same. If not same, please fill in each set of batteries and then use._x000D_ Do not mix the good battery and the battery._x000D_ The capacity of the battery internal resistance is closer will be better._x000D_ 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_x000D_ _x000D_ Note: _x000D_ 1.Due to different producing batches, product details might be a little different. If you minding the difference, please buy it carefully._x000D_ 2.Please allow 1-3mm differs due to manual measurement._x000D_ _x000D_ 3.Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same_x000D_ 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_x000D_ _x000D_ Package Included: _x000D_ 1PC X PCB Protection Board 1Overcharge, over discharge, over current, short circuit protection 2 25A W/Balance PCB Board 3plate low temperature coefficient, design, fine workmanship, testing and comprehensive 4ensure the absolute safety and reliability of the battery pack 5Compact, suitable for many of the requirements of highly integrated