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  • lciotti commented on Steve Willson Kujur's instructable Build a Power Bank in $21 month ago
    Build a Power Bank in $2

    Sorry, Did not proof read. Should have read "Your video shows you testing a battery to show how many amp-hours are left, but you do not account for the voltage drop, you basically test it until the battery is flat."What I mean is he puts the battery into that aH "meter" and he lets it sit until there are 0 volts left in the battery. If you are using this to charge devices, unless that little charger board has a boost regulator on it, when the battery voltage drops below a certain point you cannot charge anything. I can't say if this is true or not because the board has no clear manual available on-line, or at least the one site I went used to check the price did not have one. Additionally, you never should deeply discharge batteries, it is the worst thing for them...

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    Sorry, Did not proof read. Should have read "Your video shows you testing a battery to show how many amp-hours are left, but you do not account for the voltage drop, you basically test it until the battery is flat."What I mean is he puts the battery into that aH "meter" and he lets it sit until there are 0 volts left in the battery. If you are using this to charge devices, unless that little charger board has a boost regulator on it, when the battery voltage drops below a certain point you cannot charge anything. I can't say if this is true or not because the board has no clear manual available on-line, or at least the one site I went used to check the price did not have one. Additionally, you never should deeply discharge batteries, it is the worst thing for them.Sorry, but pointing out errors is not a bad thing. Instructions like this that do not take into regard safety (i.e. soldering to Li-Ion batteries) are nothing but asking for trouble.

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  • lciotti commented on Steve Willson Kujur's instructable Build a Power Bank in $21 month ago
    Build a Power Bank in $2

    Your soldering batteries, that is bad I don't care how many times you have done it before. Batteries should have tabs spot welded on. You say it cost $2 to make when all the parts on your list add up to well more than that. Your video shows you testing a battery to so how many amp-hours are left, but you do not account for the voltage drop, you basically test it until the battery is flat. Why do all this when you can go to the store and buy something smaller, well packaged and SAFE for $20.I am all for DIY, but make something work your time.

    Too many things wrong with the to even start to make a usefull commment!

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