Gremsy batteries do not have over-discharge protection built-in. It’s recommended to use battery voltage checker to make sure the batteries stay above 3V per cell.
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Battery Type: Li-ion
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Capacity: 3400mAh
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Voltage: 14.8V
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Max Charge Voltage: 4.2V per cell
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Max Charge Current: 2A
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Minimum Discharge Voltage: 3.0V per cell
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Dimensions (L x W x H): 135mm x 35 mm x 20 mm
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Weight: 192.5g