Updating My Nexus 7

I didn't use my Nexus 7 (2012) throughout the summer, so I've only received the 4.3 update. However, the device cannot be updated, without sufficient battery, which is a problem, since, after dropping my Nexus 7, the battery meter broke and constantly displays 0% battery.

Is there a way of bypassing that requirement and forcing the update? This has been bugging me for the last couple of days :(