Battery Life
Powering the Karbonn A21 was a removable Li-Ion 1800 mAh battery. This capacity was moderate, and would provide a stand-by time up to 200 hours and talk time up to 5 hours. While adequate, heavy users could find themselves needing to recharge by the afternoon. The removable design was a useful feature, allowing users to carry spare batteries for extended periods away from power sources.