Overcharge and discharge protection to prevent overcharge and discharge of the battery. Overcurrent protection to prevent abnormal high current of battery Balance protection, battery voltage balance, make battery life Stable heat dissipation, stable heat dissipation of the aluminum substrate, safety protection absorbs anti-high voltage, reduces MOS tube breakdown, ultra-low internal resistance MOS Suitable for most electric tools on the market, electric , electric bicycles, electric tricycles, electric motorcycles, electric vehicles, electric tools, etc. Product name: lithium battery protection board Model: 7 series 20A, same port, with equalizing protection Product type: 7S 20A same port Discharge current: 20A Discharge overcurrent protection value: 3-5 of continuous current Internal resistance of main circuit conduction:Less than 20m ohm Charging current [same port]: 20A Charging voltage: string number of ternary battery pack X4.2V Overcharge protection: ternary 4.25 0.03V Equalizing voltage: ternary 4.18V Over discharge voltage protection: ternary 2.8 0.1V Overdischarge current protection: ternary 150mV Working power consumption:Less than 40uA Short circuit protection detection delay: 200us Applicable product: ternary polymer solar street lamp Product size: 65 x 33 x 10mm Colour:silver Material:PCB+Metal Package Contents: 1 x Battery protection board 1 x flat cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.