normal grease bought from tinker merchants is all you need to recharge its a class SIX mana batt the empty press in a toolbox, no tink skill needed for this recharge
this and crab crackers probably the easiet way to get to 250 :(
When I tried to do this combine, I was not able to when I used a "drop of grease". I was only able to when I used the item just named "grease" I have found this item for sale from Marchap Biddinight in shadowhaven, and Bom Knotwood in Steamfront. Hope this helps, I know I was before I found the correct info.
I have hunted all over Steamfont and have yet to get Drop of Grease to drop. Site says Rogue Clockworks drops this item but i have killed nearly 50 of these and still none. Anyone got any ideas?
I've only seen them at vendors in the items sold to them, but I've heard they are a foraged item...not a drop. However, the base prototype is made with grease (purchasable at the tinker merchants).
They aren't quite unlimited charges, you do have to recharge them occasionally. They are rechargable with a class 1 battery from what I've seen in the tinker forums.