High capacity batter for radio controlled helicopter

[Magnum]

I have a radio control helicopter that has a 150 Mah battery.

Could I upgrade to this one for longer run times ?

http://www.ebay.com/itm/3-7v-1000mah...item2345a78f8e

It would probably weigh a little more, but the motor is pretty strong.

[dedndave]

probably not an issue
the difference is in chemical composition - not "more of the same"