Use a tinker and 100 diamonds I think to repair it/recharge it or pay 10K to an NPC tinker/Jewler to recharge it..
Weapon Engraving Tool
Used to engrave a single line of text onto a weapon
The engraved line of text is orange and appears below the item title
Initially has 10 uses
Uses a rare gem to engrave that must be replaced periodically:
Only highly skilled tinkerer's can replace the gem
NPC tinkerer's will replace the gem for a fee (you provide the gem)
New Rewards