What should be done with powercells

I'm too lazy to start a poll, so feel free to lost ideas below. Some of mine are:

1) make them a crafting item. They can be used to make pieces of the same colour, eg 10 rare powercells gives 1 rare item piece of random colour (red,yellow,blue or green).

2) still on the crafting idea, combining items to create perks of the same colour. Not sure about numbers for balancing, but maybe 100 cells gets you a random perk of the same rarity

3) scrap em. One powercell can be scrapped into 10 parts

4) sell em. Can be exchanged for gold the same way perks can.

5) all of the above. A new seperate tab for powercell options to do any of the above as you deem necessary.

With no changes to powercells in the latest patch (including them still most likely to be spun up on the bonus board) it'd be nice to brainstorm some ideas they can hopefully bring into the next patch.

What do you all think?