<b>Please turn on the battery switch to position "I" for charging.</b> <br><br> <b>The LED indicator of the AC/DC charger will change from Red to Green if the battery is fully charged.</b> <br><br> 12V rechargeable Lithium-ion Battery Pack is designed specifically to integrate with our Light bars, Flexible LED Lights, or most 12V DC electronic device. <br><br> <b>Technical details:</b> <br>Built-in 12pcs rechargeable 18650 lithium ion battery cells in 3s4p. <br>Capacity: 3.7V 38400mAh (11.1V/ 12.8Ah)/ 142.08Wh (12pcs 18650 cells, the capacity of each cell is 3200mah at 3.7V) <br>Input: 12.6V/2A <br>Output: 12V (voltage range is 12.6-9V) /6A Max. 5V/2.4A Max. <br>Weight: About 730g <br><br> <b>Package content:</b> <br>1x DC 12V Li-ion Battery Pack <br>1x DC5521 Male to Male Power Cable <br>1x 12.6V/2A AC/DC Charger <br><br> <b>NOTES</b> <br>Do not use the 12V lithium battery pack in places with high humidity or where it may be exposed to wet. <br>Do not modify or disassemble the power bank. <br>Do not throw the 12V power bank into fire or water. <br>Do not place the power bank during charging on flammbable materials such as in the bed or carpets. <br><b>No long-term placement in a low voltage state. In order to extend the service life, it's suggested charge every three months if long term storage.</b>