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5V 1A 18650 lithium battery charging board charger
$ 9.13 (Tax may apply)
matters needing attention：
1. The ammeter for testing current can only be connected in series at the 5V input terminal of the charging board.
2 ^ the best charging current is 0.37c of the battery capacity, which is 0.37 times the capacity. For example, the charging current of 1000mah battery is 400, which is enough. If the charging speed is too high, the effect is poor, and the battery voltage drops more after flushing!
3. The charging connecting wire shall not be too thin or too long. In this way, the connection resistance is large. If it is too thin, the battery voltage will drop more after charging.
4. It is better to have good contact with the battery. Otherwise, the battery voltage will drop more after flushing.
5. If the input voltage of 5V is too high, such as 5.2 or even 5.5, the charging current will be less than 1000mA, which is normal. When the voltage is high, the chip heating will automatically reduce the charging current without burning the chip. It is normal for the chip to heat at about 60 degrees in operation. After all, the charging current is large.
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