After a power outage which drains the battery (which is less than 1 hour for this 800VA UPS), the UPS requires a person to physically press the power button on the UPS, in order to restore power to the protected plugs.

I did not test the actual charge time from a depleted battery, but the manual and sticker claim 8hrs needed for full charge

This unit does NOT automatically restart after a power outage which drains the battery.

The battery is secured simply by the two casing halves and has no screws, tape, nor glue holding it in place

If unit is not restarted, the outlets will only operate from the battery until the battery is dead.

I bought this particular model due to the number of outlets and the replaceable battery.

This may be the case if the battery gets completely drained, but I just tested it briefly after receiving it and it switched back to mains after power was restored, judging by the warning beeps stopping

However, after the full line voltage came back and the battery was depleted & had shut the unit off, it did not restart