I bought these batteries to be used in my hard hat light. I am an electrician and I am constantly in situations in attics and above ceilings where there is minimal or no light. I was going through a package of 12 AAAs every 1-1/2 weeks recently and got fed up buying batteries and just throwing them away. These will run my 9-LED headlamp for two whole 8hr- shifts just as bright as the non-rechargeable and what's great is I can have a set ready to go on the charger and then straight to my headlamp if need arises. I am very pleased and likely will be buying some more of the AAA and AA.
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