Get an 18650 battery rechargeable headlamp off Ebay. Probably £10 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.