[Healeys] AGM Batteries

[Kees Oudesluijs]

In addition to this do it in the open air or in an extremely well 
ventilated space. The "gassing"  produces Hydrogen and oxygen, an 
extremely explosive gas mixture!!!!!!!!!!!!!!!!

A small spark from a switch or from disconnecting a lead can very easily 
ignite this volatile mixture. BEWARE!!!

Kees Oudesluijs



Op 24-4-2018 om 03:09 schreef Perry:
>
> Listers
>
> Just used this info to recharge a very discharged AGM battery.  AGM 
> style battery sat for 4 years in my old yellow 100 in a California 
> warehouse.  I had sold the car many years ago to a fellow in CA. I 
> repurchased the car. When it arrived back in Pennsylvania the battery 
> was completely flat. Using the conventional  10 amp charger would 
> barely get the battery up to 4 volts. Using the method described below 
> it is now back up to 12.5 volts.
>
> Barrowed info from the internet…..
>
> “This is a recovery method for the do-it-yourselfer using the 
> equipment you've got in the garage. With this option, you're going to 
> trick your traditional charger into charging the deeply discharged AGM 
> battery.
>
> Here's what you need:
>
> ·Battery charger (under 15 amps)
>
> ·Jumper cables
>
> ·A good battery, preferably above 12.2 volts. (It can be an AGM or 
> flooded battery- it doesn't matter.)
>
> ·The seemingly dead, deeply discharged AGM battery
>
> ·A voltage meter
>
> ·A watch or timer
>
> Now, here's what you do:
>
> Hook up the good battery and deeply discharged AGM battery in parallel 
> – positive to positive and negative to negative. Do not have the 
> charger connected to the battery or turned on at this stage.
>
> Now, hook up the good battery to the charger. Turn on the charger. The 
> charger will "see" the voltage of the good battery (hooked up in 
> parallel), and start providing a charge.
>
> After the batteries have been hooked up for about an hour, check to 
> see if the AGM battery is slightly warm or hot to the touch. Batteries 
> naturally become warm during charging, but excessive heat may be an 
> indication that there really is something wrong with the battery. 
> Discontinue charging immediately if the battery is hot to the touch. 
> Also discontinue the process if you hear the battery "gassing" — a 
> hissing sound coming from the safety valves. If it's hot or gassing, 
> STOP CHARGING IMMEDIATELY!
>
> With your voltage meter, check back often to see if the AGM battery 
> has charged to 10.5 volts or above. This generally takes less than two 
> hours with a 10-amp charger. If it has, disconnect the charger from 
> the wall outlet and remove the good battery from the charger. Now, 
> connect only the deeply discharged AGM battery to the charger. Turn on 
> the charger and continue until the AGM battery reaches a full charge, 
> or until the automatic charger completes the charge process. In most 
> cases, the AGM battery will be recovered.”
>
> Hope this helps someone with an expensive AGM battery that doesn’t 
> want to charge….
>
> Perry
>
>
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