Purchased a new U1 flooded garden tractor battery, supposedly 350 CCA. Store had a bunch on prominent display. No date of manufacture stamp. DMM displayed 12.24V directly from store (maybe 65-70°F). Placed on 12V/2A manual charger for 8 hours. Battery was just slightly warm when I checked a few hours into the charge session, but cooled before the 8-hour session was complete. 12.9V immediately after charging; 12.7V the next day. Seems to attain maximum of 12.68V after some use and subsequent charge/rest/check, at about 80°F. Loses maybe 0.02V per day.
Would any effects of sulfation, from sitting at low charge in the store, show up now, as diminished voltage capacity, or only later, as diminished battery life?
Any recommended break-in procedure? E.g. place load to lower to 12.5V, then recharge to full? Have seen this mentioned.
What are your opinions or general assessment? Likely good battery? Should I expect higher resting voltage from this new battery? Battery has a warranty, but I'm not sure how store determines whether to replace. What criteria should I use to determine whether to request a replacement before the warranty period ends?
Would any effects of sulfation, from sitting at low charge in the store, show up now, as diminished voltage capacity, or only later, as diminished battery life?
Any recommended break-in procedure? E.g. place load to lower to 12.5V, then recharge to full? Have seen this mentioned.
What are your opinions or general assessment? Likely good battery? Should I expect higher resting voltage from this new battery? Battery has a warranty, but I'm not sure how store determines whether to replace. What criteria should I use to determine whether to request a replacement before the warranty period ends?