Battery question...
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  1. #1
    Full Member Verified Member EsOne's Avatar
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    Default Battery question...

    I have an EH 18650 IMR

    Says 3.7v on it...

    This is going to sound dumb, but I just really recently got my first mod (then second, then third... oh my)
    But, I still charge it to 4.2v, max, right?

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    Quote Originally Posted by EsOne View Post
    I have an EH 18650 IMR

    Says 3.7v on it...

    This is going to sound dumb, but I just really recently got my first mod (then second, then third... oh my)
    But, I still charge it to 4.2v, max, right?

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    Yep, charge it until it stops charging.

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    Full Member Verified Member EsOne's Avatar
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    Quote Originally Posted by bruiser View Post
    Yep, charge it until it stops charging.
    I got a cheap charger. I don't trust it to stop. I manually check mine with multimeter ^_^
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    Ultra Member ECF Veteran Topwater Elvis's Avatar
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    Quote Originally Posted by EsOne View Post
    I got a cheap charger. I don't trust it to stop. I manually check mine with multimeter ^_^
    Then you are already smarter than a bunch of folks that rely on any charger to function correctly 100% of the time.
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    Yeah, 3.7 is the "nominal/average" charge, but 4.2 is the "fully charged" point...it changes continually as the battery is drained.

    Most of the useful life of the battery's charge is in the 3.7/3.6 range. This varies a bit by battery type but is the general rule. The top range doesn't last long at all, and the bottom drops to cut off rather quickly. This is why they say that the voltage curve of Li-Ion is rather flat compared to other types.
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    Ultra Member madqatter's Avatar
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    Quote Originally Posted by EsOne View Post
    I got a cheap charger. I don't trust it to stop. I manually check mine with multimeter ^_^
    Trash that charger and invest in a better one. Continue to manually check them with a multimeter.
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    Quote Originally Posted by EsOne View Post
    I got a cheap charger. I don't trust it to stop. I manually check mine with multimeter ^_^
    You've got some great advice here EsOne. You probably know this, but good chargers are pretty cheap. Get one and you won't have to worry about it overcharging. Makes charging much more relaxing

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    Full Member Verified Member EsOne's Avatar
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    On a related note.. What's the lowest I should let it drop before charging? I've heard around 3.3v, but I also hear around 3.5

    Sent from my SPH-L710 using Tapatalk

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    I aim to change batts at 3.6 volts on mechanical mods. Let it go lower and you might not catch it till it goes way low.

    As I understand it, under 2.5 volts and it's toast. Between 3.2 and 2.7 volts and you will reduce the battery lifespan.

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