I've been using Duet app intensively lately. The app lets me to use my old iPad 4 as the external monitor for daily use. Is it ok to keep the iPad plugged into the MacBook Pro all the time?. Will it add any new kind of stress to MacBook Pro?


every few weeks (3 or 4), disconnect the iPad and use it until you have about 50-75% battery left, then charge/connect it again and your battery will not suffer at all.


Actually, frequent charging habit is good for the Lithium-ion battery use device.

You could refer this Apple official page. http://www.apple.com/batteries/why-lithium-ion/


You shouldn't be worried about your Macbook Pro, more the iPad. Having the display on all the time and not using the battery might eventually 'damage' the iPad.

  • I've not heard of that before. Can you please link to an Apple site that explains that issue? I use my iPad almost exclusively plugged-in so I'm interested what damage I might be doing. – fsb Sep 29 '16 at 15:37
  • What do you mean by not using the battery? As far as I’ve understood from a similar question I posed before, unlike with a MacBook, an iPad’s components always draw their power from the battery, even when the iPad’s plugged in; keeping it plugged in is still better for the battery’s overall lifespan as it avoids deeper discharge/charge cycles. I’d appreciate knowing if I’ve been misinformed on this. – Rinzwind Sep 29 '16 at 21:35

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