About a year ago, I assembled a 60 AH 12V LiFePO4 battery to run the GOTA station during field day. The battery was stored fully charged after field day then recharged on December 14. I just took it out of storage today, 135 days later. In that period of time, the battery lost 0.351 AH of its capacity, or approximately 0.6% over 4 months (based on the amount of energy put back into the battery to reach charge cutoff at 14.6 volts).
60AH Battery Pack in a box
Since the battery is now a year old, I will run a full capacity test again. When I ran the capacity test a year ago, it actually had a 65.7 AH measured capacity (6.0 Discharge current with the test stopping at 12.0 volts).
