1) You need have the potion equipped.
2) You need to have it placed onto your hotbar.
3) Only cast it from your hotbar and highlight it. You will notice it didn't take a charge. It really does take a charge, if you inspect it- but please don't do this... you will see why in a second.
Okay, a second has passed. It reveals the true charges left, and that is going to lower what the hotbar displays. So, again, I repeat, don't inspect it.
When you zone, it'll go up to what it was before, provided that you didn't use all of the charges, and provided that you didn't unequip it or inspect it.
If you know that you've mostly used it up, but you still know you have 1 charge left, zone and it will go up to what it was.
And, if you want to use a similar trick on totems, just make sure you cancel the effect before you zone.
2) You need to have it placed onto your hotbar.
3) Only cast it from your hotbar and highlight it. You will notice it didn't take a charge. It really does take a charge, if you inspect it- but please don't do this... you will see why in a second.
Okay, a second has passed. It reveals the true charges left, and that is going to lower what the hotbar displays. So, again, I repeat, don't inspect it.
When you zone, it'll go up to what it was before, provided that you didn't use all of the charges, and provided that you didn't unequip it or inspect it.
If you know that you've mostly used it up, but you still know you have 1 charge left, zone and it will go up to what it was.
And, if you want to use a similar trick on totems, just make sure you cancel the effect before you zone.