2 Pcs 18V/21V Li-Ion BMS Battery Protection Board BMS for Li-Ion Lipo

[me]: Five strings of lithium battery protection board [Charging current]: 3A [Discharge current]:40A [Overcharge protection current]: 7A+/-2A [Over-discharge protection current]: 66A+/-5A (adjustable) [Overcharge protection voltage]: 4.25V+/-25MV (any string) [Over-discharge protection voltage]: 2.7V+/-80MV (any string) Suitable for Makita 21V lithium battery pack (It can be used on electric tools such as wrenches, angle grinders, electric hammers and garden tools) colour: as shown Material: PCB Size: 40x46x1.6mm Package Contents: 1 x Dual MOS Protection Board 1 x Three MOS Protection BoardOnly the above package content, other products are not included. Note: Light shooting 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.