Battery Weight vs. Higher mAh

[tkrahlin]

Other than flying time, is there any other advantage to having a battery with more mAh?

It seems at some point, the added weight of a ‘bigger’ battery would offset any advantage of more mAh?

For instance, compare the weight of these two Thunder Power batteries:

3s x 2700mAh x 30c -- Weight: 205-gram
Flight Time = 10-12 minutes

3s x 3300mAh x 30c -- Weight: 270-gram
Flight Time = ?

600 more mAh, but at 65-grams more weight.

If I’m happy and well balanced (my planes, not me), wouldn’t the extra flying time –if any- be canceled out or minimized by the extra weight?
.

[jrb]

The bigger mah of two 30C packs will handle more current; and, give you better performance since it has lower internal resistance -- more rpm while burning some more amps.

30 * 1.000 = 30
30 * 2.000 = 60

For example I pull a couple of more amps and have a bit more rpm with two packs in parallel in my 1/4 Cub; and get twice the flight time -- takes twice and long to charge too.

[ATIS]

JRB nailed it. More mah equals more flight time but if both lipos are the same C rating the one with the larger mah will be able to support a higher amp pull.

Now if your looking for more power without adding a bunch of weight you can go to a higher C rated lipo of the same mah.

Xtreme Power Systems carry some 30c and some 45c lipos... the 30c are thier older version but both lipos weigh the same so I recommend the 45c.

Also, in some cases the heavier lipo will not only give more flight time but on planes that need lots of nose weight you can use the heavier lipo to help balance the plane without adding dead weight. I also go for the heavier lipo over lead weights if their is room to get it in and get it in front of the CG.

[tkrahlin]

Uhh-Haa... That's good to know.

Thanks guys!!