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Charge and discharge at the same times is allowed.
Works as a 4.2V/2.1A charge(on charge mode); works as a 3.7V to 5V boost module on discharge mode.
Over current protection; over voltage protection; short circuit protection; over temperature protection.
In discharge mode, charge mode keys function is invalid.
With batterys indicator.

Charge voltage: DC4.5-5.5V
Charge current: 0-2.1A
Discharge efficiency: max. 96%
Item weight: 2g
Item size: 27 * 18 * 6mm
Package weight: 3g
Package size: 29 * 20 * 8mm

Packing List:
1 * Relay Module

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