Characteristics of a Sulfated Battery

[Joster]

Hi All,

Question:

Will a sulfated 12V Lead-Acid battery charge up to 16.2V?

Observations:

I have a 7 circuit SG hooked-up to a cap dump circuit. The output of which pulses about 1.5 Amps every 500ms to the charge battery.

I have a few 12v B.B. Battery VRLA Rechargeable 7.2 Ah batteries kicking around (not new by any means). The first one started at 13.04V (took it right out of a conventional charger) and charged to 16.13V in about 2.5 hrs.

I tried a second battery of same type. I had charged it up using the same conventional charger but it had been sitting for a day or so (it was sitting around 12.81V). I connected it to the cap dump circuit, verified everything was working correctly and left it over night. I expected it would be at least 16V the next morning but it was only around 13.04V.

Is this because this particular battery is sulfated preventing the chemistry from completing?

[alman]

quit charging with conventional charger.

Joster,
I am no expert on the circuit, but my experience has been primarily with desulfating old batteries. You are charging fully charged batteries. A battery resting at 12.65 volts is fully charged. Even the Batteries charged with the Bedini Circuit. Discharge an amp from these batteries for an hour and let your machine rip. They may top out at 14.2Volts the first few runs, just keep at it and you will desulfate it. 20 runs does well, but I discharge it down to 12-12.2, and it will rest at 12.2-12.4. I takes time though. And document so you can remember what you have done. Al

[wrtner]

Joster,
I am no expert on the circuit, but my experience has been primarily with desulfating old batteries. You are charging fully charged batteries. A battery resting at 12.65 volts is fully charged. Even the Batteries charged with the Bedini Circuit. Discharge an amp from these batteries for an hour and let your machine rip. They may top out at 14.2Volts the first few runs, just keep at it and you will desulfate it. 20 runs does well, but I discharge it down to 12-12.2, and it will rest at 12.2-12.4. I takes time though. And document so you can remember what you have done. Al

Don't forget that the SG has a reputation for desuphating because of the high voltage spikes.

[Joster]

Plan to Complete Twenty Cycles of Charge and Discharge to recondition 12V 7.2 Ah Batteries for Use in SG Experiments

[alman]

Joster,
Yes chargers regulate their top end or batteries would blow up when left on higher current charging chargers. Never being fully charged this increases the sulfation on the plates.
1. yes
2. You can discharge more than one amp, look up the c20 rate of your battery online to see how fast you can run it down without hurting it.
3. Yes
Al

[Guruji]

Hi guys I have a battery that turned like a capacitor. Is there a way how I can recover it?
Thanks.