Apple Watch doesn't turn on after battery replacement

[niceties55]

I just got an Apple Watch Series 2 that had a swollen battery that popped the watch face off.
I took the battery out and replaced it with a new one.
The "green snake" ("charge me please") shows up on the screen and eventually turns off.

However, once I turn on the watch, the logo shows up for 3-4 seconds then turns off and the watch never gets beyond this point.

It was working great before the old battery died.

 

[Mr. Awesome]

Does this still happen if you try to turn it on while it’s on its charger?

 

[Snørrbjørg]

Turn it on, leave it with the snake on screen until its completely out of power (black screen), then charge for a few hours.

 

[Never mind]

Where did you purchase the battery ?

 

[Never mind]

Two possible problems to your dilemma.

1. You bought a third-party battery
2. You messed up by opening the watch and did it yourself