Bests & Worsts Reviews from Amazon

Like most so-called C-size NiMH batteries this is actually an AA-size battery with a hollow shell around it to fit devices that require C-size. Its life is *very* short in devices that make heavy current demands. True C-size NiMH batteries will have a capacity of at least 4500mAh (these Energizer units are only 2500 mAh, like the AA that they really are). For example the Tenergy NiMH C batteries are true C-size NiMH with a capacity of 5000 mAh. The "fake C" units like the Eveready may or may not be suitable for your purpose -- just be aware of what you're getting.