I got a Pebble Time Round and teared it down.
Remove front glass.
Remove panel ring.
Remove glue tape.
Remove main circuit board.
Opposite side of main circuit board.
Two gold pad upper end of the board is electric intake.
Two golden pin on the right side is battery connector spring.
Be careful to take out battery, not to distote Li-Po battery.
And terminal lead of battery is more hardly sticked, so we need more careful to remove without corruption.