Cingular T-Mobile Blackberry 8100 Pearl Battery + Car + Travel Charger RIM Blackberry T-Mobile Cingular 8100 Pearl Replacement Li-Ion Battery Quality- Brand new non-OEM high quality lithium-ion battery. Battery Type - Lithium Ion cell delivers the most power per ounce and can be recharged hundreds of times with no lost of performance from "memory effect". Advanced lithium ion technology makes it possible. Operation Time - All talk and standby times are approximate. Battery performance depends on network configuration, signal strength, operating temperature, features selected, and voice, data and other application usage pattern. Compatibility: RIM Blackberry 8100 Pearl