We see our headlamps as emergency equipment more that a tool to use every day (or night.) We don't hike at night, cook, at night, or do anything else at night by headlamp. With that in mind, we've used a small headlamp that uses a photo battery--and one battery lasts us all season.

We have some AAA battery headlamps we use for car camping...they go dead quicker, but we use them to read, etc. But we don't carry books in our packs ..
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963