01-07-2019, 10:57 PM
I pulled the plug on the load test of this battery.
It powered my laptop through the PWR+ DC to Dc converter for ~4.5 hours consuming 11.722 amp hours for an average load of 2.604 amps.
The voltage fell to as low as 11.61 volts under load, at the end of the test
The maximum load recorded was 5.89 amps, or 70.2 watts
Watt hours consumed --142.5
Once I separated the anderson powerpole feeding my PWR+ DC to DC laptop power supply, voltage instantly rebounded to 11.96volts.
10 minutes later voltage has rebounded to 12.13v, still under the slight load of the wattmeter itself.
2.6 amps of load is nearly 3 times as much load as which the battery earned its 18 amp hour rating(0.9 amps)
Once 11.9v was reached, it seemed to lose voltage much faster than above this level.
I suspect it the voltage would continue to degrade faster and faster from the point I disconnected had I continued.
I also suspect 100% discharged would not be a rested 10.5v, like most batteries, but perhaps closer to 11.0v.
I would need to continue to watch it and see where voltage simply plummetted to the point the PWR+ car adapter could no longer power my laptop, but I'd rather not discharge the battery this low, especially not on the initial cycle.
My conclusion is that the battery performed well, especially considering the rather large load that was placed upon it. Voltage retention was impressive, as i have noticed with Many AGM batteries.
-- One cannot use the regular flooded battery '12.2v rested voltage' for estimating 50% state of charge. I suspect 50% is closer to 12.4v rested with this battery.
Now I will recharge it, letting my 40 amp power supply set loose on it set to 14.7v before hooking up the battery. The UB12180 states no more than 5.3 amps.
I'll see how long it accepts 40 amps before reaching 14.7 volts.
I'll try and see just how long it takes for amps to taper to 0.09amps at 14.7v which should indicate it is fully charged.
I'll use the same wattmeter inline, and see how many AH the battery has accepted
Once below 0.6 amps this ammeter starts readibg progressively lower than actual.
While 11.722 amps seems to be quite exact, i will give that figure an estimation of being no more than 90% accurate.
It powered my laptop through the PWR+ DC to Dc converter for ~4.5 hours consuming 11.722 amp hours for an average load of 2.604 amps.
The voltage fell to as low as 11.61 volts under load, at the end of the test
The maximum load recorded was 5.89 amps, or 70.2 watts
Watt hours consumed --142.5
Once I separated the anderson powerpole feeding my PWR+ DC to DC laptop power supply, voltage instantly rebounded to 11.96volts.
10 minutes later voltage has rebounded to 12.13v, still under the slight load of the wattmeter itself.
2.6 amps of load is nearly 3 times as much load as which the battery earned its 18 amp hour rating(0.9 amps)
Once 11.9v was reached, it seemed to lose voltage much faster than above this level.
I suspect it the voltage would continue to degrade faster and faster from the point I disconnected had I continued.
I also suspect 100% discharged would not be a rested 10.5v, like most batteries, but perhaps closer to 11.0v.
I would need to continue to watch it and see where voltage simply plummetted to the point the PWR+ car adapter could no longer power my laptop, but I'd rather not discharge the battery this low, especially not on the initial cycle.
My conclusion is that the battery performed well, especially considering the rather large load that was placed upon it. Voltage retention was impressive, as i have noticed with Many AGM batteries.
-- One cannot use the regular flooded battery '12.2v rested voltage' for estimating 50% state of charge. I suspect 50% is closer to 12.4v rested with this battery.
Now I will recharge it, letting my 40 amp power supply set loose on it set to 14.7v before hooking up the battery. The UB12180 states no more than 5.3 amps.
I'll see how long it accepts 40 amps before reaching 14.7 volts.
I'll try and see just how long it takes for amps to taper to 0.09amps at 14.7v which should indicate it is fully charged.
I'll use the same wattmeter inline, and see how many AH the battery has accepted
Once below 0.6 amps this ammeter starts readibg progressively lower than actual.
While 11.722 amps seems to be quite exact, i will give that figure an estimation of being no more than 90% accurate.
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