Battery Life
One of the more substantial aspects of the Celkon C820 is its 4000 mAh Li-Ion battery, a considerable capacity for devices of its release period. It provides up to 500 hours of standby time and up to 14 hours of talk time, translating to decent longevity for users. However, the non-removable nature of the battery could be a drawback for some, particularly in scenarios requiring battery replacement.