Hi.
1. you can buy a wall charger (charge the battery connected to the wall socket) and connect to the ipod.
2. electro Shocks to your battery. You can use a power supply of 5V (for example an AC adapter with this power) and connect with a terminals to the pads of the battery this only has to be for a seconds, otherwise the battery will be burn.
after this process you can chek your battery with a multimeter