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This is how I understand it, de-sulfating devices are good while the battery still has enough capacity to be used on a vehicle. It's better to keep the battery charged at all times from square one and not having to worry about sulfate build-up in the first place. A specific gravity measuring...

Too late here and sulfation can be prevented by keeping batteries charged at all times. From what I read, sulfation is only a problem when the battery voltage drops below 12.4.

It's not over yet.... Cranked the engine, which started as usual within seconds and ran the truck for approx 45 minutes. Turned on the Chargetek again and it spent an hour or so in constant voltage mode and switched to float charge. So far so good. Cranked the engine again, which started even...

Some time during the night the charger switched to "Stage 3" Float mode. The voltages are now 13.16 and 13.19 on the batteries and the light is green. Keeping the charger plugged in will hold the batteries at full charge. This concludes this little experiment/demonstration. The batteries are...

Battery voltages are now 14.37 and 14.45, so they have stabilized and the charger should be in "Stage 2", which is the constant voltage phase.....

Thanks, need to do my homework. :-) Looking over the article, the first task will be to define the terms used, "series strings", "pack", "cell", "monoblock" and the meaning of "battery" here.... Okay, tell me how "Stage 1" below differs from an equalization charge, please.

That is what this charger does, it addresses each battery separately and the end result should be two identically charged batteries. You may notice that the voltages are approaching the same level. Just checked them and they are now 9 mV apart, 14.34 and 14.43 respectively. I'll keep posting the...

...after about 26 hours, both batteries show 13.8 volts plus or minus....red light still on. Should switch to constant voltage mode when 14.6 volts is reached. Just checked it, now after 36 hours, they read 14.29 and 14.40.

Yesterday, I installed the two 6TMF batteries I got from Medlog at Aberdeen. The Chargetek 500 is handling it from now on and after 18 hours it is still in "Bulk charge" mode with measured voltages of 13.08 and 13.24 volts on them. Both batteries were manufactured in 2000 and measured about...