Lookin' to shave a few pounds, eh?
How about Eneloop rechargeables.
Be forewarned, I know my math sucks. But look at this.
Eneloop AA cells weigh 27 grams each, and add another 30 grams for the battery holder.
So with 10 of 'em, you've got about 270 grams + holder = 300 grams / .661 lbs. How's that?
Each cell rates 1.2V & 1900 mAh.
How long will it run? Hell, I don't know. My math sucks, remember?
Might be worth a try, though.
Oh, Costco had battery / charger combos for something like $20.
is a link to the spec sheet.