Hi fellas,
I'm attempting to charge a 12v NiMH 1800mAh battery (bank of 10 AA) but the supplied charger doesn't seem to work. When the battery has 7v remaining and connected the charger will deliver 12.9v at a feeble 5-10mA, this can't be right... right? An all night charge hardly effects it at all, it will show on the multimeter the 12.9v but under 30mA load drains within minutes.
When I connect the battery to a power supply it takes 15v to get the current draw up to 200mA. The power supply is capable of delivering 30A. This charges the battery fine.
Is this just a case of the voltage of the charger being too low (12.9v) to charge a 12v battery? the chargers are listed as 12v-100mA but as said, only deliver 12.9v @ 5-10mA into a 7v drained battery.
Just trying to figure if the chargers are junk as I suspect. Is there a voltage these should be charged at? Is it physically possible to deliver a higher current @ the 12.9v these charges give?
In theory will the 12.9v @ 5mA (when drawn into 12v drained to 7v) charge the battery compketely if left long enough? like... a month.
I'm attempting to charge a 12v NiMH 1800mAh battery (bank of 10 AA) but the supplied charger doesn't seem to work. When the battery has 7v remaining and connected the charger will deliver 12.9v at a feeble 5-10mA, this can't be right... right? An all night charge hardly effects it at all, it will show on the multimeter the 12.9v but under 30mA load drains within minutes.
When I connect the battery to a power supply it takes 15v to get the current draw up to 200mA. The power supply is capable of delivering 30A. This charges the battery fine.
Is this just a case of the voltage of the charger being too low (12.9v) to charge a 12v battery? the chargers are listed as 12v-100mA but as said, only deliver 12.9v @ 5-10mA into a 7v drained battery.
Just trying to figure if the chargers are junk as I suspect. Is there a voltage these should be charged at? Is it physically possible to deliver a higher current @ the 12.9v these charges give?
In theory will the 12.9v @ 5mA (when drawn into 12v drained to 7v) charge the battery compketely if left long enough? like... a month.
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