Please do yourself a favor and research how to properly test them for internal resistance.
Brand new batteries have IR of less than 100milliohms
Anything over 250milliohms will overheat and will not hold a charge strong enough for a drain over 1Amp esp because of the older chemistry (ICR) you need IMR batteries for newer generation flashlights like nitecore, fenix and olight.
Generally XML based lights are over 1.4-2.8amps and a battery like this is is not suitable for this application.
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