 Slightly OT: New PC925 battery not getting to full charge |
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| Literati914 |
 Jan 13 2026, 01:08 PM
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Advanced Member  Group: Members Posts: 2,185 Joined: 16-November 06 From: Dallas, TX Member No.: 7,222 Region Association: Southwest Region  |
Couple days ago I picked up two new Odyssey PC925 batteries from a marketplace seller who was supposedly selling them for his dad. The story was that his dad bought them for a couple of electric bike builds and they were too heavy. Dad chose something else after only opening and trying one of them (one was unboxed and one had never been opened when I purchased). So they sat for 4-5 months, his dad said 'get whatever you can for them'. The seller had them at $200 a piece, before dropping them to $100 each - which is what I bought them for.
The one that was already opened was only showing like 7V so I put it on a little charger I already had (not necessarily the recommended type, that I'll need to purchase I guess). I kept a watch on it so it did not over charge.. but I finally took it off the charger when it reached 12.25V or so (took a long time tbh). I installed it in a 2.5L Volvo wagon (will be going in 914s eventually), it showed 14.3-4v, so I did a 20+ mile loop on the freeway to finish topping it off. I did not check it as soon as I returned but about and hour after the drive, it's still only showing like 12.15V. Is this just a bad battery or need more (proper) charging? |
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| rjames |
Jan 13 2026, 10:58 PM
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I'm made of metal Group: Members Posts: 4,422 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest 
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The Odyssey PC925 needs a compatible charger to maintain it or it will die an early death. Ask me how I know. Get the right charger and it should last a long time. I've been very happy with mine.
All the links I can find for compatible chargers aren't working anymore. I'm using a Battery Minder 128CEC1, which was one the approved models. |
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| Artfrombama |
Jan 13 2026, 11:47 PM
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#3
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Artfrombama Group: Members Posts: 418 Joined: 21-January 24 From: North Alabama Member No.: 27,870 Region Association: South East States
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QUOTE(rjames @ Jan 13 2026, 10:58 PM)  The Odyssey PC925 needs a compatible charger to maintain it or it will die an early death. Ask me how I know. Get the right charger and it should last a long time. I've been very happy with mine. All the links I can find for compatible chargers aren't working anymore. I'm using a Battery Minder 128CEC1, which was one the approved models. My NOCO as well as the Battery Tender maintainers have settings for AGM, flooded and lithium batteries |
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Posts in this topic
Literati914 Slightly OT: New PC925 battery not getting to full charge Jan 13 2026, 01:08 PM
Artfrombama
Couple days ago I picked up two new Odyssey PC925... Jan 13 2026, 01:27 PM Superhawk996 AGM batteries want to charge at higher voltage - 1... Jan 13 2026, 04:24 PM fiacra I've had a different experience than Artfromba... Jan 13 2026, 05:18 PM flipb Optima makes their own charger/maintainer that see... Jan 13 2026, 05:35 PM burton73 My buddy Mark Sonners had a Red top in his 914 wit... Jan 13 2026, 05:44 PM rick 918-S I bought a battery tender from Harbor Freight last... Jan 13 2026, 05:45 PM Root_Werks Run a PC925 in my Bug and PC1200 in my 914-6 for 5... Jan 13 2026, 06:05 PM Jack Standz
Optima makes their own charger/maintainer that se... Jan 13 2026, 07:31 PM
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