Lemfo Lemt does not start

I have a problem with my lemfo lemt.
I wanted the battery to discharge completely.
When it reached 1% the screen turned off (without going into power saving mode, which is disabled)
The lemt didn’t respond when i pressed the main button.
However, from the watchdroid app it kept reporting that I had 1% battery.
The battery ran out and I put the smartwatch to charge. The charging icon would appear for only a few seconds, then turn off without responding to button presses.
Charge the watch for an hour (it got hot) but it won’t start. It keeps showing the lemfo logo and charging icon for a few seconds with the charger plugged in and then turns off again.
The main button seems not working!!
What could be happening?
I try flash the fw, not work.
Similar problem in this post

Thx in advance!