So I recently got the Mace of Molag Bal, but after I killing around 4 NPCs the enchantment lost its charges. So I wonder how I'll be able to recharge it.
I went to an Arcane Enchanter, but I could just disenchant other items, and enchant other items as well.

How do I recharge the Mace of Molag Bal? Thanks.

With a filled soul gem.

Moving this to spoilers.

You press the recharge button in the menu while hoevering over your weapon. In the PCs case it's T. You indeed us a filled soul gem as Summer says. Higher levels of soul gems recharge more.

Yes, I figured that much.
But since I had several filled greater gems at the time I still couldn't recharge the item in question.

Maybe it's not user error.
Since patch 1.2, I have been unable to recharge weapons. I was hopeful it's another key binding issue, but after trying every key on the keyboard...I think recharge just doesn't work anymore.
To clarify, I get the "T" option to recharge, but nothing happens.

I just thought you had to use an Arcane Enchanter, it worked with the simple T.
Thanks guys.