I've seen complaints about this lamp's battery life so I wasn't surprised when it drained batteries quite quickly. When the first alkaline batteries ran down, I replaced them with 1300 mAh rechargeables. The difference was amazing; the light output was much brighter, and replacement time was much longer. So I'd advise that only high mAh rechargeable batteries be used from the start. Then you won't be changing them nearly as often and the batteries will soon repay their initial higher cost. Isn't that better than running to the filling station all the time?