Panasonic - 04C/04H - KX-T Series - 3850, 3855, 3870, 3875, 3880, 3900, 3910, 3910MX, 3920, 3930, 3932, 3935, 3940, 3950, 3960, 3965, 3980

Ni-MH - 750 mAh 3.6V, 43 x 30 x 15mm
Connector: Fully Universal (2 separate plugs to replace the single original plug)
If you have a NiCd battery pack in you phone, it has now been replaced with the newer NiMH version. The NiCd battery packs are no longer available for phones. The NiMH version is a more modern battery and in most cases, will give better performance than the older NiCd battery.