The 620 comes with a removable 1300 mAh battery which gives you 14 hours of talk time on 2G and 9 hours on 3G, the company claims.
Since the Windows Phone OS does not seep much power, the battery worked well.
It lasted for a day and a half after some casual gaming, music playback and lots of social networking.
But as you keep increasing the number of apps and functions, the battery might eventually give in.
Unlike its elder siblings, the 820 and the 920, the 620 cannot be charged wirelessly. A microUSB charging slot is available below the phone. (Vying for attention)
Apart from the 8GB onboard storage space, the 620 comes with a microSD card slot, with memory expandable up to 64GB. The phone works smoothly on the 512 mb RAM. You also have SkyDrive cloud storage.