Description:_x000D_ This board is 4 string 30A 14.8V lithium battery protection board, high current protection board, continuous 30A currrent, with balance circuit _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Working current: 30A_x000D_ Balanced current: 60mA_x000D_ Over current: 60A_x000D_ Temperature range: -30 - +80_x000D_ Over charge detection voltage: 4.28+ 0.05 V_x000D_ Over charging voltage: 4.095-4.195V_x000D_ Over discharge voltage: 2.550.08_x000D_ Over charge detection delay time: 0.1s_x000D_ Short circuit detection delay time: 100ms_x000D_ Over current detection delay time: 500 ms_x000D_ _x000D_ Size:56x45x1.2mm _x000D_ Weight:18g _x000D_ _x000D_ Main function:_x000D_ Over charge protection, over discharge protection function, short circuit protection_x000D_ function, over current protection function, balance._x000D_ _x000D_ Interface definition:_x000D_ Charging port of the plate and the discharge port is the same, both positive and B- connecting_x000D_ battery"-", P- charging port and port on the negative electrode;_x000D_ B-, N-, P- pads are all over the hole, the hole diameter of the pad is 3.5mm;_x000D_ The battery charging detection interface with DC output in the form of needle. Do the same mouth_x000D_ when the N- is not wiring._x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 1 x 4S 30A 14.8V Protection board_x000D_ _x000D_ _x000D_ _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 cable color is random, please take the real one as standard. _x000D_ 5. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.