I have an Energizer brand 1W LED flashlight (I'm almost positive that the LED is Luxeon) that uses a single 1.5v AA battery.
So far I've been using rechargeable NiMh 1.5 batteries, but their capacity leaves much the be desired. I could use 1.5v non rechargeable Lithium AA batteries - but they tend to get expensive. I was looking at rechargeable AA Lithium battries, but they are all 3.7v (and I know that they require a different charger).
So I'm wondering, if I was to switch to these batteries, am I going to damage the LED, or the driver will regulate voltage as required?