I have a 12v 700CCA 90Ah car battery with a odd behaviour. The loadtester says its performance are good and the readings are around 800 amps starting capacity. The digital batterytester says it good with a SOC of 70%, 500A and an internal restistance of about 5 mohms. All this looks good, but when I discharge it with a constant load of 3A , the battery drops to under 11volts in just 4hours, wich means it only delivers around 15Ah. Never experienced this behaviour before, what causes til behaviour ?
