Muckaway:
Are they the ones that charge diect from mains like a phone?
Cheap lights such as those from Poundstretcher type stores are a false economy; If they don’t pack up you’ll spend a fortune on batteries.
LED lights use very little battery power. This is also the reason that every car should be fitted with LED running lights to the front from now onward. LED lighting has come on in leaps and bounds in the last couple of years and it wont be long before the headlamp bulbs are all LED too