I have L-Style installed since yesterday (I didn't installed Honduras as planned, as I downloaded the Zip file two times, and both times the file was corrupted) and, aside that yesterday it went again from 70% to 0% in 15 seconds, I recharged it and the battery graphic is something like this:
Edit: Well, what do I know. I was trying the camera app (Lenovo Super Camera) and as soon as I started, the phone shuts down. And then I restarted and the battery is now at 3% (from 70% when I started the app). Yesterday was when I started a game. I guess all intensive processor use causes this behavior. I can use the web, read some news, answer emails and use Whatsapp and the battery meter goes down quick, but normal.
I don't really know if it is my battery or the motherboard is shutting down.