2S Application: Suitable for 3.7V and 4.2V full voltage lithium batteries (including 26650, lithium polymer batteries, no size limitation) Product size: 45*15*3.4mm (Standard), 48*20*3.4mm (maintain)Charging voltage: 8.4V - 9.0V Continuous discharge current (upper limit): 20A (if the cooling environment is not good, reduces the use current load) Continuous charging current (upper limit): 10A Standard version: suitable for running drills with current up to 25A below 50W or resistive load below 168W.3S 3S 12.6V lithium battery balance board Range: rated voltage 3.7V, 4.2V lithium battery full voltage (including 18650, 26650, lithium polymer battery) Recommended voltage: 12.6V Product size: 15 *30 (40.50) * 2.4mm Balancing current: 100ma, suitable for 2000-4000mAh battery (40.50)*2.4mm Product weight: 3g Recommended voltage: 16.8V Balancing current: 100ma, suitable for 2000-4000mAh battery Package included: (Optional) 1 pcs PCB board (2S/3S/4S) Note: 1: This product does not Can replace using lithium battery protection board (no overcharge protection and over discharge protection); Work: First full single battery is discharged, waiting for other batteries to be charged. 2: Accurate according to the wiring map, then the wrong line may led to the board burning; The balance board works when the heat is large, please isolate the battery. 3: This product is used in parallel with the standard lithium battery protection board, it can achieve balanced charging. 4: If the battery capacity of the internal resistance difference is too large, there will be no time to balanced or cannot complete the balance of the situation, it is recommended to re-match the battery