I bought a (used) Samsung Galaxy phone on eBay about three weeks ago, but it seemed that the battery was useless. It would lose all charge within hours, so I purchased a new battery (also via eBay) which FINALLY arrived yesterday.
In the meantime, the original battery has decided to play nice and is keeping charged for a few days, depending upon use.
I’m guessing that I am going to need the new one sooner or later, but wondering what to do with it in the meantime. Can I just leave it untouched until needed, or do I need to ‘charge’ it, then leave it alone?
tl/dr What’s the shelf life of an unused battery?