It says the 36v/7ah battery uses Sanyo GA 3,7 V 3500mah cells. So 3.5 amps, not 6.
36V 5.2ah: LG 3,7V 2600mah
36V 5.8ah: LG 3,7V 2900mah
36V 6.4ah: LG 3,7V 3200mah
36v 7ah: Sanyo GA 3,7 V3500mah
I understand absolutely nothing about electro physics or what you may call it, to be honest.