Kyocera K9 KX414 KX9D KE433 KX9B KX9C Li-Ion Cell Phone Battery (700-850 mAh) High Capacity replacement Lithium-Ion Battery rated at 700-850 mAh Expect to Approx. Double Your Talk and Standby Times Standard replacement battery for you to keep as an extra power source handy This replacement battery is guaranteed to be compatible and work with your cell phone