In an average week day with light usage you probably aren't going to have any problems, and you might squeeze a couple of days of use out of it between charges. (techradar.com)
That should translate to around 5 - 6 hours of light usage with Wi - Fi on and a reasonable screen brightness level. (gadgets.ndtv.com)
On lighter usage, you will likely only need to recharge every day - and - a-half to two days. (pocketnow.com)