Why won't my LG Extravert 2 stay on?

[Android Central Question]

I've had my extravert for a few years as a vacation phone. Today it started acting up. I was texting a friend when it shut down, no powering down screen, nothing, nada. I plugged it in, thinking that it might help. It comes on and says that the battery's full, so I unplugged it and held the power on button. There was no response. I plugged it back in and turned it on that way. The phone booted up nicely and went to the menu screen. A few seconds after being turned on, it shut down, no Verizon logo saying that it was shutting down. I had it near water earlier so I have it sitting in rice. (After taking the back off and checking the circuitry, which in fact, does not look wet in the part I could see) I don't think the water is the problem. Any idea as to why it isn't turning on?

 

[B. Diddy]

Welcome to Android Central! The battery has probably failed. It could be due to water damage, but that phone is almost 5 years old, so that's pretty old for a battery. Try a new battery.