In continuation of selecting the best motor for my X8 (Octo coaxial) build for video/photography (see post here : http://www.diydrones.com/group/arducopterusergroup/forum/topics/tiger-motors-propellers-combinations-for-an-heavy-lift-octocopter),
I must now compare and select the best battery in 6S votlage. I collected some information on various web site to compile a comparison for three categories of 6S batteries based on capacity : 5000 mah, 6000 mah and 8000 mah. I intend to fly with two packs in parallel, so I did not care to analyze bigger capacities like 10.000 mah , also because they are hard to find in these common brands : Zippy, turnigy nanotech and Kypom (i limited the comparison to these three brands because they can be found quite easily online in Europe and in the US, thanks to the Hobbyking web site, the onlylipo.com web site and the altigator.com web site, etc).
I defined five criteria as follows:
-price (in euro)
-weight (in grams)
-power density 1 (capacity in mah divided by total weight of battery). Higher is better. You get more capacity per gram.
-power density 2 (capacity in mah divided by total price in euro). Higher is better. You get more capacity per euro.
-Compacity. This is the biggest dimension of the battery in mm. Smaller is better. I chose only to compare on the biggest dimension because this is the constraint of my craft (battery holders are max 170 mm long in my design)
And the winners are :
-In the 5000 mah category : Zippy 30 C. It is best on 3/5 of the criteria and second best on 2/5 of the others in an unsignificant manner.
-In the 6000 mah category : Zippy 30C (again). It is best on 4/5 ot the criteria and second best on 1/5 of the others in an unsignificant manner.
-In the 8000 mah category : guess what... Zippy 30C (again again). It is best on 3/5 of the criteria and second best on 2/5 of the others.
Unless Zippy batteries are bad quality, Zippy seems to be a great battery. I would like people who have experienced Zippy batteries to give here in this post their testimonials about their quality and durability ?