So I have 3 510 batteries here 2 came with the kit 1 was separate. The 2 that came with the kit seem sealed at the bottom no hole in the middle the pink extra one I have does have a hole. Whats up with that, they are all manual.
JOYE had been changing things around as far as battery construction goes over the last few months. Some of the batteries we have from them dont have a hole and some do.. I have been a little frustrated with JOYE for that and a few other issues.
My manuals have no actual hole - but some have little recessed 'blind' holes. One of my PT (inline battery one) has it, but the 5v manual doesn't. Apart from this there is no differnce between them and juice never gets inside.
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