Originally Posted by
SubarooMike
So would I need the bigger one??
Probably, well at least assuming your range includes a 5000mAh 3S. The smaller one is only capable of around 4 amps on a 3S due to the 50 watt power limit.
Plus generally better to buy a little extra if you can afford it (and why not at those prices), more allowance for future needs and such.