battery packs and chargers

[Adityav95]

guys i'm planing to use either of the foolowing batteries for my robot:
1.    http://www.all-battery.com/6v2000mahnimhsidebysiderxreceiverbatterypackswhitecconnector11106.aspx

2.    http://www.all-battery.com/72v2000mahnimhrechargeablebatterypackforwalkingrobotsandrcplanes.aspx

i'll be using it with the roboduino, so ill use the 3 pin connector.

can anyone tell me a charger that can be used to charge the battery with 3 pin connector(to use with roboduino)?? it should work between 100-240V(approx) and must be less than $10.

pls help!!
thnx