Sanyo Katana User Manual page 243

Disposal of Lithium Ion (Li-Ion) Batteries
Do not handle a damaged or leaking Li-Ion battery as you can be burned.
For safe disposal options of your Li-Ion batteries, contact your nearest
Sprint authorized service center.
Special Note:
Be sure to dispose of your battery properly. In some areas,
the disposal of batteries in household or business trash may be prohibited.
Section 4A: Important Safety Information 227