iPod touch has an internal, lithium-ion rechargeable battery, which currently provides the best performance for your device. Compared with traditional battery technology, lithium-ion batteries are lighter, charge faster, last longer, and have a higher power density for more battery life. To understand how your battery works so you can get the most out of it, see the Important safety information for iPod touch.
Using Low Power Mode can significantly increase the life of the battery charge. Switch to Low Power Mode when your iPod touch battery is low, or when you don’t have access to electrical power.
Go to Settings Battery Service and Recycling website.