Wireless Technologies Li-Ion Battery for Kyocera K10, KX414, KX444 Advanced lithium-ion technology delivers long-lasting, rechargeable power Ultra lightweight design minimizes phone weight Excellent as a replacement or spare in case of emergency Recharges with no memory effect like NiCad batteries Compatible with Kyocera K7, K9, K10, K404, KE413, KE433, KX414, KX444, Raven, Phantom