01-07-2019, 05:32 PM
As I reported, new batteries tend to act a bit strange before their first cycle.
The amperage of this new 18Ah AGM tapered to the 0.65 amp level at 14.7v slowly over 4+ hours, and the battery decided to climb in temperature 0.2 degrees F in a climate controled environment.
I decided to remove the charger rather than leave it connected until amps taper to 0.5% of capacity which would be 0.06 amps. I dount it would actually taper to tht level, given previous experience with spanking new AGMS.
With a spanking new lifeline GPL-31xt battery, which would be full when amps taper to 0.625 AH at 14.4v, I noticed it refused to taper to less than 0.93 on that initial charging. One deep cycle to ~50% and 40 amp recharge and the amps tapered as exepected in a normal time frame of under 6 hours.
My Northstar AGm when new would NOT hold a resting full charge voltage of over 13v as Northstar dictated it would, until i did a deep cycle, and 25 amp recharge to full, after which it was full charged resting at 13.06v.
So now I need to actually cycle this new battery once. Ideally I would try and pull 9Ah from it at a 0.9 amp rate over 10 hours and see where voltage rebounded to in X amount of time, then perform this same test at a later date for comparison.
The amperage of this new 18Ah AGM tapered to the 0.65 amp level at 14.7v slowly over 4+ hours, and the battery decided to climb in temperature 0.2 degrees F in a climate controled environment.
I decided to remove the charger rather than leave it connected until amps taper to 0.5% of capacity which would be 0.06 amps. I dount it would actually taper to tht level, given previous experience with spanking new AGMS.
With a spanking new lifeline GPL-31xt battery, which would be full when amps taper to 0.625 AH at 14.4v, I noticed it refused to taper to less than 0.93 on that initial charging. One deep cycle to ~50% and 40 amp recharge and the amps tapered as exepected in a normal time frame of under 6 hours.
My Northstar AGm when new would NOT hold a resting full charge voltage of over 13v as Northstar dictated it would, until i did a deep cycle, and 25 amp recharge to full, after which it was full charged resting at 13.06v.
So now I need to actually cycle this new battery once. Ideally I would try and pull 9Ah from it at a 0.9 amp rate over 10 hours and see where voltage rebounded to in X amount of time, then perform this same test at a later date for comparison.
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