Hi I just got a light for Father's day that uses 4 c size and I want to replace it with 18650 or something similar. It's a Duracell Durabeam Ultra. I can't anywhere on what's the bulb voltage. Can anyone help?
http://duracellflashlights.com/product-details/?pid=1000L-922241
http://duracellflashlights.com/product-details/?pid=1000L-922241
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