1. Applicable to tools Applicable to 2V lithium battery pack (can be used on electric tools such as electric drills) 2. Charging protection |C effectively controls MoS to prevent battery overcharging and cause battery explosion 3. Short circuit protection Automatic protection in case of abnormal short circuit to prevent damage to the protection board and battery 4. Over-current protection prevents excessive current between batteries, causing battery damage [product name]: suitable for Dewei protection board [Charging current]:2A [Discharge current]:20A [Overcharge Protection Current]:7A+/-3A [Over-discharge protection current]: 33A+/-3A (adjustable) [overcharge protection voltage]: 4.25V+/-25MV (any string) [Over-discharge protection voltage]: 2.7V+/-80MV (any string) Colour:green Material:plastic Size: 30 x 13mm Package Contents: 10 x Lithium battery protection board 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.