NRG Game: Simplifying Battery Replacement

AA and AAA are easy to confuse, especially when the lettering on a used battery is hard to read. For NRG Game, I gave each size a symbol as well as a colour. A green triangle identifies AAA batteries, a pink circle identifies AA, and a yellow square identifies C.

The concept extends from the battery and its pack to the device itself. A matching symbol inside the battery compartment would let someone identify the replacement they need even after the old battery has been removed.