This is good for the price. It's not as bright as I was hoping it to be - you get what you pay for. You can use 3 AAAs or 1 18650 (flat top). I'm already using a 18650 Battery 3000mah but it's still not as bright as I had hoped it would be.
I also saw this go on lightning deal after I bought it so if you want to buy this, maybe wait for it to go on lightning deal.