Gel batteries
Hi. I have acquired two used 135ah 12v gel batteries. They are 5”x18”. They were back batteries that were changed out after a years service. I think they really have no usage. My question is how...
Forum Discussion
Which charger did you use on the 2 amp setting?
My friend has a 2/10 amp schumacher that on the 2 amp setting will not go above 13.7v, and was at less than 0.62 amps on a battery I knew was nowhere near fully charged.
Irritated, I put my meanwell power supply on this battery set it at 14.7v and the battery was taking over 16 amps less than a minute after taking it off the 2/10 amp schumacher, and the ~100Ah battery wound up accepting 33 more AH, according to the attmeter on my Meanwell output, before amps tapered to a low enough level where they could be considered fully charged.
Voltage fresh off the charger is basically meaningless, unless it instantly drops to 12v or below, indicating a shorted cell.
Do not trust any charger to do what it says it will do. Verify. With an Ammeter in addition to a voltmeter.
Put somethng like this inbetween charger and battery. DO NOT trust any charger to do what it says it will do without verifying.
inline wattmeter
Most people with absolute faith in their whizz bang smart charger purchase will be extremely let down if they actually knew and understood what was NOT going on, which should.
My friend has a 2/10 amp schumacher that on the 2 amp setting will not go above 13.7v, and was at less than 0.62 amps on a battery I knew was nowhere near fully charged.
Irritated, I put my meanwell power supply on this battery set it at 14.7v and the battery was taking over 16 amps less than a minute after taking it off the 2/10 amp schumacher, and the ~100Ah battery wound up accepting 33 more AH, according to the attmeter on my Meanwell output, before amps tapered to a low enough level where they could be considered fully charged.
Voltage fresh off the charger is basically meaningless, unless it instantly drops to 12v or below, indicating a shorted cell.
Do not trust any charger to do what it says it will do. Verify. With an Ammeter in addition to a voltmeter.
Put somethng like this inbetween charger and battery. DO NOT trust any charger to do what it says it will do without verifying.
inline wattmeter
Most people with absolute faith in their whizz bang smart charger purchase will be extremely let down if they actually knew and understood what was NOT going on, which should.
