Last year we were afflicted with many battery maladies. We got a CBA IV, at the same time we switched from the old KOP chargers to NOCO Genius G3500 battery chargers, found on Amazon. We found that our old KOP chargers were only charging our batteries to between 25-50% of capacity. We don't know how they degenerated to this state, just that they were a large part of our battery-related problems.
The new chargers worked faster, and fully charged our batteries. Combined with testing on the CBA IV, we discovered that these chargers give a diagnostic click to indicate bad cell problems that usually show up after the surface charge is quickly depleted on the field. They also have an AGM mode and a series of status lights that make it very easy to tell what state of charge a battery is in. Additionally, the NOCO chargers have automatic maintenance and repair modes for long term charging or recovery of heavily drained batteries.
Highly recommended! We have two, but I wish we had just one more. We had no issues keeping all of our batteries charged through a regional.
NOCO Genius G3500 UltraSafe Battery Charger