Double single lithium battery charge management lithium charging board TP5100 4.2v 8.4v ; Input voltage: 5-18V DC power supply (actual 5-12V is appropriate) TP5100 built-in input overcurrent, undervoltage protection, over temperature protection, short circuit protection, battery temperature monitoring, reverse battery protection TP5100 programmable charge current 0. 1A-2A; Programmable steady precharge current 10% -100% Wide operating voltage 5V-18V, dual battery trickle charge into pre-charge, constant current, constant voltage three phase; red and green LED charge status indicator TP5100 charging management power supply module suitable for portable devices, various chargers, smart phones, tablets, power tools, walkie-talkies, etc. Colour: green Material: plastic Package Contents: 6 x TP5100 Battery Charger Protector Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.