This mode is used to charge the internal battery with the LED bulb off. ![]() However, most inverter LED bulbs come with a charge-only mode. The bulb is designed to charge the internal battery even during normal operation. Thereafter the charging voltage is automatically cut to protect the battery from getting overcharged. These internal batteries require three to four hours of charging time to fully charge. ![]() Most inverter LED bulbs have lithium-ion batteries that provide three- to four-hour backup.
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