Brand Kyocera K612 Strobe / SwitchBack KX21 Li-ion Battery (800mAh) 100% new high quality generic (non-OEM) Li-Ion Standard Battery Stay in touch longer by getting battery power with a Lithium Ion Battery for phone. Integrated microchip prevents overcharging & lengthens battery life. Best replacement for the original battery with comparable standby and talk time. Great bargain Excellent quality guaranteed!