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If the battery has expired then no technically you can't. iOS won't boot unless a certain charge level is detected.
 
You can, but you gotta give it a few minutes to build up a little bit of a charge before it'll turn back on again. It doesn't take long though.
 
There are old iPad's which no longer hold a charge long enough. But have there been any reports of iPad batteries that have completely given up the ghost? Unable to function for even a second without being plugged in??
 
Any iPad that struggles to even hold charge probably won't be worth using anyway as it'll no doubt have other issues too. Or just get the battery looked at or replaced by Apple.
 
Any iPad that struggles to even hold charge probably won't be worth using anyway as it'll no doubt have other issues too. Or just get the battery looked at or replaced by Apple.

I have an iPad 2 that for 95% of the time sits in my kitchen attached to a charger acting as a TV. That will likely increase to 100% over time as my kids move on to newer devices for their needs. As a TV it works perfectly, so I can definitely see how an iPad has a great deal of value even if it is as immobile as a desktop PC.
 
Don't keep it plugged into the charger all the time. That can be bad for the battery and shorten its lifespan.

My ipad 1 was bought on day 1 and was heavily used daily (until today) and still holds many hours of charge. I only plug into the charger when I need to recharge the battery.
 
Of course, the ipad will just continue to charge it's diminished battery while you use it blogged in even though it won't hold a charge...like my 7 year old dell Inspiron that has no battery capacity any more so it is always plugged in
 
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