Get an 18650 battery rechargeable headlamp off Ebay. Probably ÂŁ10 and ultra bright if you investigate and select carefully re the LED die they choose. Get one with two cells mounted at the back, and a strap over the top.
Dispose of any supplied 18650 batteries (supplied Ebay ones they will be poor quality and potentially incendiary). - Better to buy the bare torch without cells. Buy known fused-cell reliable 18650 cells. Also get a quality 18650 charger - not the one supplied.
Take care with "branded" knock-offs with lithium batteries, hence I always use Xtar factory shop (which you can google).
Lasts all day, often two days.