I shut the phone down, swapped the original, now-plump battery and inserted the new one, reboot and now I get a yellow warning triangle (attached pic).
Before stripping its sticker away to see how original it is or not, I would like to ask if anyone has seen this and if it is easy to fix.
I've read about warning triangles with thermometers, which is NOT my case. My yellow triangle has the battery crossed out, and when I go into the phone's OS, I get a very loud beep and a "Battery disconnected" popup and every indication that the battery isn't charging.
My phone is using NeatROM with the stock kernel that comes with the installer.
Everything works fine with the old, original battery: usb charges, wall charger charges, no "disconnected battery" pop up, so definitely, the new battery is the problem, but is this normal when swapping batteries?