Please turn on the battery switch to position I for charging. The LED indicator of the AC/DC charger will change from Red to Green if the battery is fully charged. 12V rechargeable Lithium-ion Battery Pack is designed specifically to integrate with our Light bars, Flexible LED Lights, or most 12V DC electronic device. Technical details: Built-in 12pcs rechargeable lithium ion battery cells in 3s4p.
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