<p>The successful start of the drill requires three 15C-20C power battery, or six 10C-15C power battery (ordinary 18650 can not start the drill).</p> <p>Strictly according to map wiring 0V, 4.2V, 8.4V, 12.6V, 16.8V, do not deliberately short circuit.</p> <p>When the load of the brush motor is used, try to connect a non- capacitor (with stand voltage above 25V, capacity 10uF-100uF) to the motor's positive and negative terminals to prevent the reverse spike from the motor. Break the MOS tube.</p> <p>Groups of batteries in series, please that the voltage of each group of batteries,if not the same, please fill each battery separately and then use in series.</p> <p>The Discharge test, the voltage drop faster battery that group is poor battery.</p> <p>Product Description:3S 12.6V 40A lithium battery protection board with Balance for Screwdriver</p> <p>Scope: Nominal voltage of 3.6V, 3.7V lithium battery (including 18650,26650, polymer lithium battery)</p> <p>Charging voltage: 12.6V-13.6V</p> <p>Continuous discharge current (upper limit): 40A (if the cooling environment is not good, please reduce the load current use)</p> <p>Continuous charge current (upper limit): 20A.</p> <p>Name: Protection Board</p> <p>Colour: green</p> <p>Material: PCB</p> <p>Package Contents:</p> <p>2 * Protection Board</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light 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.</p>