December 2013
I use one of those headlamps alot and replacing the batteries is getting expensive. Are there affordable rechargeable batteries that provide the same burn time as single use batteries?
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Are there ever! Rechargeable 3.2V Lithium Iron Phosphate (LiFePO4) cells are surely the answer. They're powerful but safe, very lightweight and available in both AA & AAA sizes at ~US$5 each.
Perhaps best of all is that one will replace two 1.5V alkalines (or 3 NiMH!).
Simple placeholding dummy cells can pad out the battery bay. I've taken to using these in my Canon digital cameras to great effect.
