urgh not sure it uploaded right.
anyway not being an expert - this charger is from my laptop and has a type C connection.
Just so i dont blow myself up - does the output look ok? will the battery regulate it? or is it not fit for purpose.
I have used it and it took a bit over an hour - i didnt leave unattended and kept an eye on the temperature but not being used to these things im worried i might shorten the life of these expensive batteries.
Maybe a tip if your worried about batteries.
To keep your batteries in good health leave them charged when not used.
These kind of batteries suffers when empty drained, they will harm themselves.
Not that they will explode, but unwanted chemical reactions will then can happen resulting in batteries unable to charge well.
(anodes/kathodes get sealed by unwanted chem. reactions, some people call it memory effect ).