Why my new 12AH LiFePO4 battery is only charged to 5.5AH initially? Anything wrong?
I've got the brand new 12AH rated LiFePO4 battery.
The smart charger I use is 2A. I used this charger before
with another 9AH LiFePO4 battery without any problem.
So I assume the charger is good.
Here is what I noticed from "WATTS UP" battery meter after charging /discharging it three times
The charging current was between 1.67A - 1.60A. became 0A toward end.
charging voltage was 53V - 55V and jumped to 60V toward the end.
charging time was about 3 hours.
The total charges went into the battery was between 5.5AH - 6AH.
the charger light turned green from red at the end and stopped charging.
If I left the battery on the charger with green light longer the charger
will turn red and charged the battery for about half minute and turned green again.
Is this normal with a new LiFePO4 battery?
Does it have anything to do with "balancing cells" with initial charge for a new battery?
Will the battery eventually be able to charge to the full 12AH after using it for a while?
I may have to return it if this is not normal.
thanks for you help.
What is the voltage of your pack? How bout the old pack(9ah)? Do you know how many cells in series? What type of LiFePO4's are they?
LiFePO4 cells normally come from the factory at a partial state of charge. So, your first charging being about 6 AH is probably normal. Don't discharge the pack below 2.5 volts per cell. You will probably put a full 12AH of charge in them unless you discharged the pack to a harmfully low level.