Gros Ventre
Well-known member
- First Name
- Bill
- Joined
- Nov 13, 2021
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- Western Wyoming
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- Powerboost
Lead-acid batteries need an initial "wetting down charge." The very large batteries in submarines have a specific initial charge regimen. I had some funny voltage warnings early in my trucks life. Bought an AGM specific battery charger and charged it up to 100%. Even though it had been in service it required about 10 hours at the 2 amp rate to properly charge it. Curiously after this charge (a 100% charged lead-acid will have a no-load terminal voltage of about 13.2V) the truck then quickly ran system voltage back down to 12.6V and operates there. My inference is that Ford has chosen to set things at this 12.6V. The downside is that Ford takes a "new" battery, wets it down, and installs it without an initial "wetting down" charge and then operating it at 12.6V means it never really properly charged up. While this works, if you want long term good battery operations get one of those AGM chargers (and AGM specific type charger is important) and give yours a low rate, long time charge as soon as possible after delivery or new battery installation. This effectively sets up the chemistry throughout the battery.
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