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  • Convert Your Old Laptop Battery Into a Power Bank

    Nice but a bit over engineered, probably cheaper to buy from China.I picked up a couple of dozen old laptop batteries from the tip for ten bucks.When the tip shop opens,which is every second day there is a crowd outside waiting like the boxing day sales.I broke a couple of packets up, used the battery charger to select the good ones then soldered together enough to make 12v.I then charged the pack with an old fashioned transformer powered automotive charger.Nothing was happening on the ammeter so I went off and did something else.An hour or so later I smelt burning, went and had a look, a couple of the batterieswere glowing a bright cherry red.Oops!I sorted that ,I now charge through a 12v 36/48watt incadescent light bulb.As the batteries pull more amps the bulb drops the voltage.Rou...see more »Nice but a bit over engineered, probably cheaper to buy from China.I picked up a couple of dozen old laptop batteries from the tip for ten bucks.When the tip shop opens,which is every second day there is a crowd outside waiting like the boxing day sales.I broke a couple of packets up, used the battery charger to select the good ones then soldered together enough to make 12v.I then charged the pack with an old fashioned transformer powered automotive charger.Nothing was happening on the ammeter so I went off and did something else.An hour or so later I smelt burning, went and had a look, a couple of the batterieswere glowing a bright cherry red.Oops!I sorted that ,I now charge through a 12v 36/48watt incadescent light bulb.As the batteries pull more amps the bulb drops the voltage.Rough as Guts but it works

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