More Misinformation, stated as fact.
Thank you for proving my point.
Yes, they are VRLA, but they are also AGM.
Says so right in the second line in their marketing.
www.power-sonic.com
In deep cycle use it is best to regularly be able charge them at upto their 30% rate, or nearly 4 amps for this 12 AH battery, and then hold them at 14.5 to 14.9v, until amps taper to 0.06, if they ever taper that low.
I exceed this rate often by huge amounts, nearly each and every deep cycle and my small VRLA AGMS behave well. They charge nearly as quickly as when new and have nearly the same voltage retention powering loads as they did when new, and I have the tools and interest to observe this occurring, time after time, when discharging and recharging.
They will perform better for longer and last longer in deep cycle usage when their 27% to 30% maximum rate is met.
High amperage forces migration of the electrolyte through the glass matting into the plates. Low and slow trickle charges with too little a finishing voltage, will never complete the task, once the battery has gained some age, and they will gain age faster when only treated to a timid low voltage low amperage recharge regimen that the lawyers deemed safe and the bean counters seconded as overall cheaper regardless of what the lawyers care about.
If they are lightly cycled then it matters much much less what the charger does, but when they are drained well below 50% it is extremely important to charge them fully, promptly, and occasionally, at a much higher rate, even one well over the stated lawyerly safe maximums.
Charging source has to bring them to the mid 14's for a period of time. that time depends on teh amperage rate which brought them there, and their age/condition..
One Can't fully charge a well depleted lead acid battery in less than 5.5 hours and once older its more like 8.5+ hours even with high amperage source seeking and holding high voltage and near end of life it is closer to 14 hours.
If one is not going to bother insuring their charger can meet what the lead acid battery desires in a specific use, the best they can do is plug in the charger promptly after any level of discharge and hopefully until the next time the battery is required to be used, 12+ hours later. The 12 hours of charge time, is the basis for the 10% rate, It s not a magical balance that if one exceeds or come short of, things explode.
Either one does the best with what one has, or increases the ability of their charging sources, or just replaces the batteries far more often that would otherwise be required.
But it is not horrible quality batteries failing prematurely, it is over discharging, poor charger, along with poor charging habits that are almost entirely responsible for poor battery lifespan.
Do not low and slow charge AGM batteries in deep cycle usage, time after time. They occassionally need the high amp blast and the absolute true full charge and best is one leads to the other.
PSOC usage of lead acid batteries quickly destroys their capacity and makes the provided charging source more and more inadequate.
Some of these smaller VRLA AGMS are marketed for deep cycle, some are for high rate applications, some of their marketers will proudly say both. I think it's all marketing BS, and if they weigh the same in the same case dimensions the internals are made the same, the difference is perhaps only the strength of the electrolyte saturating the glass matting. Stronger acid means better short term performance but lesser duration.
Thank you for proving my point.
Yes, they are VRLA, but they are also AGM.
Says so right in the second line in their marketing.
PS-12120 12V 12Ah General Purpose VRLA Battery | Power Sonic
The Power Sonic PS-12120 is Part of our Class-Leading Battery Range. Find Out More Today.
www.power-sonic.com
In deep cycle use it is best to regularly be able charge them at upto their 30% rate, or nearly 4 amps for this 12 AH battery, and then hold them at 14.5 to 14.9v, until amps taper to 0.06, if they ever taper that low.
I exceed this rate often by huge amounts, nearly each and every deep cycle and my small VRLA AGMS behave well. They charge nearly as quickly as when new and have nearly the same voltage retention powering loads as they did when new, and I have the tools and interest to observe this occurring, time after time, when discharging and recharging.
They will perform better for longer and last longer in deep cycle usage when their 27% to 30% maximum rate is met.
High amperage forces migration of the electrolyte through the glass matting into the plates. Low and slow trickle charges with too little a finishing voltage, will never complete the task, once the battery has gained some age, and they will gain age faster when only treated to a timid low voltage low amperage recharge regimen that the lawyers deemed safe and the bean counters seconded as overall cheaper regardless of what the lawyers care about.
If they are lightly cycled then it matters much much less what the charger does, but when they are drained well below 50% it is extremely important to charge them fully, promptly, and occasionally, at a much higher rate, even one well over the stated lawyerly safe maximums.
Charging source has to bring them to the mid 14's for a period of time. that time depends on teh amperage rate which brought them there, and their age/condition..
One Can't fully charge a well depleted lead acid battery in less than 5.5 hours and once older its more like 8.5+ hours even with high amperage source seeking and holding high voltage and near end of life it is closer to 14 hours.
If one is not going to bother insuring their charger can meet what the lead acid battery desires in a specific use, the best they can do is plug in the charger promptly after any level of discharge and hopefully until the next time the battery is required to be used, 12+ hours later. The 12 hours of charge time, is the basis for the 10% rate, It s not a magical balance that if one exceeds or come short of, things explode.
Either one does the best with what one has, or increases the ability of their charging sources, or just replaces the batteries far more often that would otherwise be required.
But it is not horrible quality batteries failing prematurely, it is over discharging, poor charger, along with poor charging habits that are almost entirely responsible for poor battery lifespan.
Do not low and slow charge AGM batteries in deep cycle usage, time after time. They occassionally need the high amp blast and the absolute true full charge and best is one leads to the other.
PSOC usage of lead acid batteries quickly destroys their capacity and makes the provided charging source more and more inadequate.
Some of these smaller VRLA AGMS are marketed for deep cycle, some are for high rate applications, some of their marketers will proudly say both. I think it's all marketing BS, and if they weigh the same in the same case dimensions the internals are made the same, the difference is perhaps only the strength of the electrolyte saturating the glass matting. Stronger acid means better short term performance but lesser duration.
