Temporary power after water damage
I got my iPhone wet by spilling some water on it. It initially continued working for a few hours and then cut out. After that it wouldn't power on, so I ditched it. A few weeks later, I plugged it into a charger and out of nowhere it powered up again. I found that the phone would stay on continuously if plugged in, but when unplugged the phone would last 15-20 minutes and then would cut out again. After this Id have to plug it back in for it to turn on. The phone always powers up again from 0%.
Is this a simple battery fault which a replacement would fix, or could it be more?
Thanks in advance for any answers
Is this a good question?