5 Strings 18.5V 18650 Lithium Battery Protection Board Anti-overcharge Overdischarge 21V Solar Battery Protection Board

1. Caution:
- Can not be used for lithium iron phosphate batteries, hernia lamps, hand drill battery packs
- Can not be used for electric fishing machine battery pack, electric bicycle battery pack, children's car batteries, more than 550 power type motor, 1W fish-eye LED lights
2. Applicable to the following products: massager battery pack, LED lamp backup power, 12V electronic products, solar street lamp battery pack, monitoring backup power, and other products
3. 3A current discharge products, battery discharge rate should be more than 3C.
4. The battery will be hot in use is the battery multiplier is not applicable, this situation can not be used for a long time, the battery will be quickly damaged
5. Strictly according to the diagram wiring 0V (B-), 3.7V (B1), 7.4V (B2), 11.1V (B3), 14.8V (B4), 18.5V (B+), do not intentionally short-circuit
6. need to charge first after connecting the wire, only then there will be output
7. When connecting 5 groups of batteries in series, please ensure that the voltage of each group of batteries is the same, if not, please fill each group of batteries individually and then use them in series. When discharging test, the batteries with fast voltage drop are poor batteries
8. Note: do not mix good batteries and bad batteries together, the closer the capacity/internal resistance of the 5 groups of batteries, the better (3 good batteries + 2 bad batteries = 5 bad battery results)

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