chargers

i was at the track today running my rc8. I have 2 5000mah 4s batteries i use. My charger is a Hyperion 6060i AC/DC. When i started to charge one of my batteries it would only charge it at 3amps. i never really thought anything of it. but it should be charging at 5amps cause its a 5000mah battery. I then put my second battery on my buddys ice charger and it charged it at 5amps and was pluged into a powersupply.

i was wondering why does my hyperion charger only charge at 3 amps and my buddys ice charge at 5.

is it cause im pluged into the wall and he is on a power supply.


thanks.