- what player you've got (H1xx or H3xx)
H320
- what capacity battery it was (2200, 2100, 1450 mah, etc...)
2100
- what type it was (ionity, ipod 1st/2nd generation, etc...)
newertech Ipod 1st/2nd gen
- if you had any problem during the replacement that might be related, like having to solder wires to the battery or something.
Just do what saints said ^^^ 