If you left them with their batteries empty then the batteries are likely actually dead.
If you're going to leave a device untouched for an extended period, make sure the battery is atleast 50% or more full before doing so.
IIRC you can't turn off Fitbit devices. You have to drain the batteries completely so that the device powers down by itself. Utter shit design, but it is what it is.
You can't turn fitbits off (at least the fitness trackers). They are their on or flat (as far as I'm aware anyway)
If you left them with their batteries empty then the batteries are likely actually dead.
If you're going to leave a device untouched for an extended period, make sure the battery is atleast 50% or more full before doing so.
IIRC you can't turn off Fitbit devices. You have to drain the batteries completely so that the device powers down by itself. Utter shit design, but it is what it is.
You can't turn fitbits off (at least the fitness trackers). They are their on or flat (as far as I'm aware anyway)
Ahh, if so that is a rather awful design choice