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    proper and safe way to measure battery length

    Hate to switch subjects in the middle of a thread but, many people mention using magnets on top of their batteries to extend the length of the battery. What kinds of magnets are these and where can they be bought?. Why a magnet instead of just using some type of metal like, copper for instance?.
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    proper and safe way to measure battery length

    Your post made a light go off in my head. When you mentioned "plastic", I remembered that my dial caliber is made of hard plastic. Should be ok to use it, right?.
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    proper and safe way to measure battery length

    I have been using 18650 li-ion batteries of late. Noticed that some batteries are shorter than some others I have on hand. My first thought was to use a dial caliper to measure them. Then it dawned on me that by touching the top and bottom of the battery with the same instrument, it might short...
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    flat top vs button top batteries

    Will performance be the same, button vs flat top?. I am using button tops now and they are working ok. Curious as to why some strongly prefer flat tops.
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    flat top vs button top batteries

    Why do people prefer one over the other?. Is there a difference in performance?. Reason for asking: I would like to try some Samsung 18650 30q s in my Acebeam K70. Mtn. Electronics has been out of the flat tops for some time, and are still out. They have the button tops "in stock", in the same...
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    Li-Ion battery capacity and life

    I have been trying to learn about Li-Ion batteries of late. Reading a lot and watching videos. In some videos, it says that when Li-Ion batteries are charged over and over, they can permanetely loose as much as 20% of their initial capacity. If this is true, does this mean that after continued...
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