The Motorola RAZR truly hearkens back to the olden days where flip phones were the most stylish accessories you can get. Unfortunately it's nostalgic in more ways than one - the RAZR also brings back memories of a time when your phone battery wouldn't last a full day of use.
According to Android Central, the 2,510mAh battery was probably the largest they could fit into the RAZR's flip design. The capacity is similar to the Pixel 4's 2,800mAh battery (which doesn't even have form factor as an excuse) and performs similarly too.
2 measures of battery life were included in the report - total battery life (including standby) and screen-on time.
Android Central's experience with the RAZR's total battery life was abysmal, to say the least. With light to moderate use, it only averaged 13 hours total, and decreased by an hour or two with heavy usage.
Screen-on-time isn't as terrible, but drops to the lowest end of the 4-6 hour average range. The maximum result yielded by their tests was 4 hours and 42 minutes, while the lowest was 3 hours and 42 minutes. Interestingly enough, heavy usage doesn't seem to impact the battery life as much as data-reliant usage.
Sadly, this means you'll probably have to carry a power bank wherever you go. Motorola says an update is scheduled for when the RAZR goes on sale, but whether it will improve the battery life in any way remains unknown.