I have a 6amp digital charger and have been going through and charging all of my batteries one by one. When I plugged the first one in it said it was around 64%. An hour or two later it said it was fully charged. I didnt believe it so I disconnected and reconnected it. It said it was at 73%. I had the same thing happen a few more times and with a different battery as well. I know voltage can be a bit higher to give false readings sometimes but this seems like its way off
https://www.batterychargers.com/en/products/battery-chargers/sp1298-6a-12v-automatic-battery-charger
Specs:
6A FULLY AUTOMATIC BATTERY CHARGER
FOR ALL POWER SPORT, CAR AND BOAT BATTERIES
For charging Lithium ion (LiFePO4), Standard and AGM vehicle batteries
Charges small batteries and keeps stored lead-acid batteries charged
Microprocessor controlled ─ multi-stage charging for added precision, safety and battery life
Float mode monitoring ─ automatically maintains optimum battery charge
Reverse hook-up protection ─ helps prevent damage to battery and charger
Scrolling digital messaging ─ provides step-by-step instructions to properly charge your battery
Button for display and battery type
LED indicates charging status
Quick-connect harness ─ attaches any of the (included) three connectors in seconds
Hook attachment ─ hang outside the work area, for safety and convenience
Schu Eco Energy ─ meets the highest industry standards
https://www.batterychargers.com/en/products/battery-chargers/sp1298-6a-12v-automatic-battery-charger
Specs:
6A FULLY AUTOMATIC BATTERY CHARGER
FOR ALL POWER SPORT, CAR AND BOAT BATTERIES
For charging Lithium ion (LiFePO4), Standard and AGM vehicle batteries
Charges small batteries and keeps stored lead-acid batteries charged
Microprocessor controlled ─ multi-stage charging for added precision, safety and battery life
Float mode monitoring ─ automatically maintains optimum battery charge
Reverse hook-up protection ─ helps prevent damage to battery and charger
Scrolling digital messaging ─ provides step-by-step instructions to properly charge your battery
Button for display and battery type
LED indicates charging status
Quick-connect harness ─ attaches any of the (included) three connectors in seconds
Hook attachment ─ hang outside the work area, for safety and convenience
Schu Eco Energy ─ meets the highest industry standards