If anyone buys a battery ( or anything else where a warranty might need to be proved ) TAKE A PICTURE OF the RECEIPT immediately.... and file it in a couple of places..
the paper , usually heat imprinted , will not show what was printed on it... in a couple of years... maybe shorter than that...
ALSO.... check out this warning about handling that paper.... so take a picture and get rid of the actual paper...
BPA chemical may lurk in cash register receipts - CBS News