Phone won't read battery percent?
 

Whenever I boot up my phone, I get the "main battery low" message, but my battery meter reads 100%. If I continue using the phone like this, then sometimes it will continue working for as long as the battery holds out, but other times it'll die and won't turn on, even though it was just charged a few minutes ago.

It has happened to me on two different roms so far, and I don't know how to fix it. Has this happened to anyone else?