Apple Pencil battery changeable?

No, it cannot be replaced.

It is a very tiny, probably, custom, specialised Li-ion cell.

Not something you can purchase from Apple or “off-the-shelf”!

Even if you could to get to the internal compnents in an Apple Pencil, to do so means, basically, destroying the entire Apple Pencil to even get into its innards.

If your Apple Pencil and its Li-ion battery died, you need to purchase another $100 Apple Pencil.

Sorry.

The Li-ion battery cell in an Apple Pencil is very small a constantly discharges at a fairly fast and regular rate.

Because of this and the “always ON and active” nature of the Apple Pencil, you need to constantly and consistently keep the Apple Pencil charged. It doesn't have to be charged fully, but the Pencil needs to have some significant charge in it at all times! Even when NOT using it, the Pencil hss to have some charge in the battery.

IF you let the Pencil discharge to 0% and leave it in the condition for 3-5 days, that tiny Li-ion battery WILL die and your Apple Pencil will be dead! You’ll have to pop for another $100 Pencil.

That small, tiny Li-ion battery can't take being discharged for a very long time without failing.

Just one of the long list of reasons I do NOT LIKE OR USE an Apple Pencil with my iPad Pro and use a much better designed and thought out, third party smart Bluetooth stylus for the past 2 years I have had my iPad Pro.

Still works well from the day I purchased.

It doesn’t do the whole side shading thing and it needs extra setup within compatible apps, but I don't have to worry about battery issues (has an auto shutoff feature), NO Bluetooth/iOS issues and works consistently and very well with the over two dozen apps that it is compatible with.

Good Luck to You!

It is not “always on and active”. If left sitting unmoved, it’s built-in accelerometer will put it into sleep mode. At that point you will see it disconnect and disappear from the battery widget display. It will re-pair when picked up or moved again.

In sleep mode my year and a half old Apple Pencil loses somewhere between 5-10% charge every 24hrs. That is only a fraction of the active or in-use discharge rate.

I am NOT seeing this from all of dead Apple Pencil posts here and posts from Apple Pencil users who left their Apple Pencil not charged up (battery run down to 0%) and are dead from not being charged up for a week or less!

Not seeing what you are describing, Michael.

Not seeing this here, at all!

Sorry.

Have you seen tear downs of the Apple Pencil?

The Li-ion cell in the Apple Pencil is smaller than the eraser head on a real wood pencil!

I see it all the time and always have. I’ve had my Apple Pencil since they first became available.

I really don’t care about the tear downs. I’m speaking from nearly 18 months of direct personal use of the Apple pencil with a 1st gen 12.9” iPad Pro and now a new 10.5” iPad Pro. Lay the Pencil down and let it sit for 15-20 minutes and you’ll see it disappear from the battery widget as it disconnects and enters a low power standby state. Move it and it instantly re-pairs (and then pops back up on the battery widget). That’s the whole point of having built an accelerometer into it. It knows when it is in use and when it is idle and still.