Is there a sure-fire way to check if a battery is officially done and does it become unsafe to use in a regulated mod at some point?
I still have my very first 18650's from March 2019 in my rotation, but we are seeing that some of the batteries (I own 14 18650's that were bought at different times, between my wife and I they service 2 Gens and 2 Swag 2's) only charge up to about 88% and some seem to deplete a bit quicker.
Is there a way to test how much zing a battery still has, or will they simply not charge up one day? I got my wife into vaping and certainly don't want to put her into an unsafe situation, can anything bad happen from using old batteries in a regulated mod?
I still have my very first 18650's from March 2019 in my rotation, but we are seeing that some of the batteries (I own 14 18650's that were bought at different times, between my wife and I they service 2 Gens and 2 Swag 2's) only charge up to about 88% and some seem to deplete a bit quicker.
Is there a way to test how much zing a battery still has, or will they simply not charge up one day? I got my wife into vaping and certainly don't want to put her into an unsafe situation, can anything bad happen from using old batteries in a regulated mod?