Specifications: Product Name: Battery Protection Board Color: Green Charging voltage: 84V~90V Continuous discharge current (upper limit): 20A (if the heat dissipation environment is not good, please reduce the load current to use) Continuous charging current (upper limit): 10A Enhanced version: Suitable for electric drills with starting current below 25A, power below 50W, or resistive loads with power below 168W. Balanced version: suitable for electric drills with starting current below 25A and power below 50W, or resistive loads with power below 168W, with balanced charging function. Product size: 45*15*3.4mm (enhanced version), 48*20*3.4mm (balanced version) Product weight: 2.9g (enhanced version), 3.7g (balanced version) Scope of application: suitable for nominal voltage 3.7V, full voltage 42V battery (including polymer battery, no size limit) Optional Stype: Enhanced Version, Balanced Version Quantity: 1pc Package Included: 1 Protection Board Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data.