Timeline for New AGM 12V battery at 10.8V - charger says it is full
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Jul 3, 2022 at 1:54 | comment | added | Criggie | @YanickSalzmann I'd guess it was a combination of the battery sitting on the shelf at the shop for months and they didn't do any topup charges, AND you cranked the engine over on the battery. A smart charger should continue to trickle charge or "maintain" the battery if left connected overnight. | |
| Jul 2, 2022 at 18:37 | comment | added | Yanick Salzmann | Also now it starts the generator like there is no tomorrow. How weird… | |
| Jul 2, 2022 at 18:24 | comment | added | Yanick Salzmann | I am not exactly sure what happened, but before doing that I hooked it up to the generator again and did a few more starts, proabaly a minute or two in total. Eventually the battery was down to almost 9V but it would still crank normally. I then added it to the charger again and the charger showed 40% empty and charged it back to 100% over 2-3 hours. Its been resting for a couple of hours now and staying strong at 12.9V. Running it more has kind of "unkinked" it. | |
| Jul 2, 2022 at 12:28 | comment | added | Pᴀᴜʟsᴛᴇʀ2♦ | @YanickSalzmann - Your diagram is accurate. That is what I'm talking about. As far as charging, I'm not sure exactly how it works, but basically (the way I see it), the charger "sees" the lead acid battery and charges it, though the AGM will bring the overall charge of the "system" (the two batteries as a system) down. The charger will continue charging until it seems the system as being fully charged. (Again, I don't know if this analogy is completely accurate, but it is how I see it in my head.) | |
| Jul 2, 2022 at 11:18 | comment | added | Yanick Salzmann | Interesting, I do have a (large) lead acid battery sitting around, I might give it a try. You mean like this, right: qph.cf2.quoracdn.net/main-qimg-60716050894f39c35d77c57aa7e5b56e . Does this mean the lead acid battery would charge the AGM battery and lose voltage and the charger would replace that in the lead acid battery? | |
| Jul 2, 2022 at 11:10 | history | answered | Pᴀᴜʟsᴛᴇʀ2♦ | CC BY-SA 4.0 |