I have a Hope Vision 2 that's about 4 years old. The battery holds charge fine when it's not connected to the lamp unit (no noticeable loss of charge when not used for a fortnight and stored with a full charge).
If I connect the lamp unit to the battery and store it in the same place the battery will have insufficient charge to power the light after a couple of days*.
Is this normal?
*I've not been leaving it switched on