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1 successful beginning of the drill calls for three 15C-20C strength battery, or six 10C-15C power battery (ordinary 18650 can't delivery the drill). 2. strictly in keeping with map wiring 0V, 4, 8, 12, 16, don't deliberately quick circuit. 3. When the load of the comb motor is used, attempt to connect a non- capacitor (with stand voltage above 25V, ability 10uF-100uF) to the motor's fantastic and destructive terminals to forestall the alternative from the motor. Break the MOS tube. 4. 3 groups of batteries in series, please that the voltage of each group of batteries,if no longer the same, please fill every single battery separately after which use in series. 5. The Discharge test, the voltage drop quicker battery that group is deficient battery. Product Description:3S 12 40A lithium battery protection board with Balance for Screwdriver Scope: Nominal voltage of 3, three lithium battery (including 18650,26650, polymer lithium battery) Charging voltage: 12 - 13 Continuous discharge latest (upper limit): 40A (if the cooling environment is not good, please cut the load current use) Continuous payment latest (upper limit): 20A. Color: green Material: PCB Package Content: 1* Protection Board Only the above kit content, other merchandise are not included. Note: Light and varied reveals may cause the color of the object within the picture slightly assorted from the genuine thing. The size allowed error is +/- 1-3cm.