which extra batteries should I buy?

[ronny p]

I fly 4 mins nano techs c05m brushless. Got them from hobbyking way better than stock.

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[highlightshadow]

+1 mini aviation ones ... got 4 of em and they're spot on.... nanotech's are decent enough too though

[SaneAdam]

The Thunder Power one's are really good. Fast lad do a good deal on a pack of 3. They are a bit smaller than the stock and the Overlanders. The weight saved really shows in the air. They have a lot of pop and the power feels a bit more "instant" than it seems to with other packs. I do really like the Overlanders also.

[Zeeflyboy]

You on stock setup?

Thunder power or chrome are both pretty good options.

I wouldn't bother with nanotech ones - I treated mine with care, and still after a couple of months use the heli was falling out the sky.