With the new battery it didn’t last my Sunday run. I suspected that it got moisture in it so I put it right on top of a dehumidifier. Tried another battery it didn’t boot, certified dead.
From the autopsy I saw moisture marks but there isn’t a lot, the battery got a little warm as well, I don’t see any burn mark or rust on metal parts. If you see this post and are still owning a healthy Echo watch please keep your watch away from water. The water seal rings look a bit flimsy and it wasn’t designed to repel water. I never put it under water I washed away sweat by running water a few times.
The residual value of my investment is now the heart rate belt. Although the workmanship of the belt is unsatisfactory, as the sharp edge cuts my skin, but so far it’s working fine.