Battery Life
A 2500 mAh Li-Po battery powers the Rainbow 4G, offering up to 18 hours and 40 minutes of talk time on 2G and up to 11 hours and 45 minutes on 3G. Standby time is up to 200 hours, showing that the phone could last through a full day of typical use, which was quite satisfactory for mid-range devices during its release period.