wel i had a bad week with batts.so i wanted to tell my experiants.
the batts we use here has a sort seal ( stamp ) that warns you ,
for excample is bad or worn out.on one side is a sort off sticker,
and it has little wires behind who you cant see when the bat is good.
but when the batt is swelling the seal ( stamp ) expand and the,
little wires become exposed.that tells you not to use that batt,
anymore,the batt becomes dangerous.