[suicideneil]

It all depends on the application. MAh capacity isnt the overriding factor though. In a small vehicle you want to match the battery to the motor- so say a 5600kv motor on 2s is fast, but a 4700kv motor on 3s is amazing. In a big truck the same applies. A hot motor like a 7xl is great on 4s say, but you would run a 9xl on 5 or 6s. Capacity is just a matter of price- the more $$$ you spend the more mah you get really, though the smaller the cell the less mah you can physically squeeze into it- think 2500mah AA batteries vs 4200mah C cells- but the AA cells have greater limitations on the current you can draw. Wattage is seperate really, thats to do with the power of the motor- Watts divided by volts = max amp draw of the motor I believe...