This Alcatel CAB22D0000C1 Battery Pack Li-Ion 3.7 V 650 mAh is the perfect replacement for your old and worn out battery. It is compatible with OT-665 cellphone and ensures long-lasting performance. With a capacity of 650mAh, this internal battery provides enough power to keep your phone running smoothly throughout the day. This battery pack is designed by Alcatel, a renowned brand in the mobile industry. It is easy to install and provides a reliable source of power to your phone. Additionally, it is compatible with other Alcatel devices, making it a versatile accessory for your cellphone.