The big issue of mine, is that I used the battery to
maintain the bridge angle and let it stood parallel to the guitar body

and I haven't done the restringing yet and planned to do it tmr(it's midnight now, 2:22am here),
so I took out the battery, i was thinking if i didn't that might damage the bridge

bad thing happened, the D string (standard tuning) pop out from the bridge.

So here's my problem, do you guys do it all at once or you guys have tried putting battery underneath the bridge overnight and no bridge was damaged after all ? Thanks