UC-50 Multi Charger gives the option to charge the LI-50 B Battery either via USB or AC Connection. Further it is possible to charge even other Lithium -Ion batteries with optional battery cartridge, which is available separately. Charging time for LI-50 B is around 210 minutes. This is the charger for the Lithium Ion Rechargeable Battery ( LI-50B ). This charger replaces the LI-50C charger that is included with your camera. It's always handy to have a second charger for use at work, or on vacation.