Went to put some batteries from yesterday in the charger and noticed a tear in the wrap on one of them. Checked the date on the battery to see whether it was worth rewrapping. I write the date on the wrap with a sharpie and cover it with clear tape but this one was too blurred to read. Never had that happen before, guess it must have got juice under the tape.
Then I went through all my batteries to check the wraps and the dates. I replace them after 3 years and there were 4 that passed the three years last month. No other torn wraps. I ordered 6 more batteries.
Don't get to order much vape stuff these days. Just batteries and flavors.
I put dates on all mine as well. I have 8 that will hit the 3 year mark in April and 13 that are about 5 months old. Those are 18650's. I also have 6-21700 that are about 4 months old.
I always rotate a lot of batteries, probably way too many.