Ian... I disconnected the main service breaker when the power went off... on when I noticed street light across from the house

Tjin... my headlamp is a Black Diamond with a rear battery pack, running on 3 AAs... for me, it is more comfortable than the headband elastic AAA lights for prolonged wear... YMMV

in 2004, AA made the most sense to standardize with... NiMH Eneloops were pretty much king of the mountain at that time..they work in my bicycle tail lights, TV controller... Fenix E21...Fenix E12... SolarForce Z2...Midland weather radio... Reecom weather radio.. Grundig F200 radio...Coleman Hi Tech, and small Coleman LED area lights