Apple Pencil and Battery life

No need to shut down Blutooth. Just go to blutooth under settings click the red I next to pencil and click forget this.

Then just pair again as ususal when you wan to use again. You will have to click pair on a window that pops up tho.

I turn off my bluetooth every time I've done with whatever device I am using. My Pencil continues to loose battery charge even when my iPad Bluetooth is off. I can charge the Pencil too 100%, set it in its holder and not use it for a few days and when I reconnect it to my iPad it will be at 60%.

The apple pencil is never off at all. When you unpair it, the pencil does go into a low power sleep type mode. But it is still on (it is always on - there is no mechanism to turn it off) so that it can be instantly re-paired as needed.

In unpaired, low power mode, it should be able to go at least a week or even two (at least when new) without running the battery fully down. I have gone several days without using it, and just charge it quickly again when I need it.

Once you've paired a Pencil with the iPad Pro, the battery will always be use by the Pencil, even if you're not using the Pencil.... simply because the Pencil is always communicating with your device throughout the day....The only way to stop this is to turn the Pencil "off" again, which means that you have to turn off Bluetooth on the iPad Pro again. You need to go to settings to do this. Of course this also means that when you turn off your Bluetooth, it will also effectively remove the Apple Pencil from your iPad which will then put your Pencil to "sleep."

OF course when you need to use your pencil again you will have to go through the procedure of plugging it in again, the same way you did at the beginning. Hope this helps......