specification: Standard voltage: 1.5 V Rated power: 15Wh Output voltage: 1.5 V Input voltage: 5 V Charging limit voltage: 5 V Full charging time: about 1.5 hour Material: High quality Fireproof PC + stainless steel Battery life: less than or equal to 1500 cycles Description: 1) Need to stick when using battery 2) During the charging process, the indicator light will flashing green and stop flashing 3) Charge the battery with a 5 volt USB phone charger and plug in the Type C USB cable. 4) Place the battery in a suitable place for the photo frame, all for the anode and cathode. 5) Rechargeable lithium battery, environmentally friendly, charged by any standard Type C USB connector. 6) The over-charging, over-discharging, and short-circuit of this mobile phone case built into the halt protection circuit.