Optima red top. Unknown age. Working fine. I went to sea for 2 months. Got home and it was dead as a doornail. Optima touts their batts as staying charged for 8 to 12 mos. And I've measured the leakage current on my rig, it's negligable. Whatever maybe it's just old. I Jumped it and drove it around for a while. THe next day dead as a doornail. Bought a wallyworld 10 amp automatic battery charger and started leaving it on all night every night. It would get me to and from work but always cranked slowly and while charging you could hear the electrolyte boiling and outgassing. Thats bad in a sealed battery, in fact Optima says on their web site that any Optima with boiling electrolyte is junk, more or less.
So I went to Costco and shelled out $180 for an Optima Yellow Top, figuring it wouldn't shit it's bits if I drained it, I have a bad habit of draining batteries. Take it home, put it in the Jeep, it's got a pretty low voltage like 11.5 but whatever I figure I slap it on the charger overnight. Next morning I take if off the charger and turn the engine over, turns over kinda slow. Turn it off, measure the voltage, 11.5. WTF?? Charge it overnight a few more times, no improvement. After coming off the charger and settling down open circuit voltage is consistant < 12v. Optima specs say OCV on a fully charged batt should = 12.8V.
The optima yellow top specs say:
Rapid Recharge:
- Maximum voltage 15.6 volts (regulated).
Maximum current:
- No limit as long as temperature <125°F (51.7°C).
Maximum recharge time:
- Charge until current drops below 1 amp.
http://www.optimabatteries.com/optima_edge/technical_specs.php
OK so I put a 10 amp manual charger on it and check the temperature on the battery periodically. After an hour, what do you know, boiling electrolyte. Take off the charger, drain off the surface charge, WTF 11.5V.
This battery is going back to Costco. I'm pretty unimpressed with optimas at this point. Any battery that can not be charged in accordance with the manufacturer's reccomendation is a POS.
Maybe it was dead from the get-go, maybe I should take my voltmeter and try to find a yellow top with higher voltage?
Too bad nobody in San Diego sells Odysseys.