Top Positive Review for Charging Board on Banggood USA|Shopping USA

17% OFF 20pcs TP4056 5V 1A Lipo Battery Mini USB Charging Board Charger Module 11,98€ 14,38€ View It

Overall:

aliensdrei 18/06/2017

From 20 boards only one is exactly 4.2V, few are 4.16-4.17V, and half are <4.15V so the batteries won't be fully charged. Fortunately only one is 4.21V so there is no risk of overcharging.

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bluehell Did you read the manual? It won't start charging if cell is at least 4.15V to avoid thickle charge, so that could be a reason why it is not charging for you if you connect to an almost full battery. Discharge below 4.15 first.
Reply 20/06/2017

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