For Batteries I chose the Falcon F3A cells. They come with a 6 month warranty but only time will tell if they provide more cycles than the leading brand. Price is about the same. The penalty is 5 ounces over TP cells. With TP cells the E Pinnacle will make weight easily even if you are not careful about weight savings. The extra 5 ounces caused me to re-think a few things regarding weight. After making the mock-up batteries it was apparent that my current weight would be over 5 kg. I changes steel for aluminum wherever I could. I changed the wheel axels from 8 x 32 steel bolts to NMP aluminum axels. The 4 mm landing gear bolts and nuts were changed to aluminum. These two items saved about 1 ounce by themselves. Small areas of unneeded wing root and stab root were removed for savings of a few more grams. All extensions were changed for the minimun length that fit. Extra wire like the charging lead from the switch harness was removed. As I had switched to a 900 mah TP 2 cell Li poly for the Rx battery I would not be charging it in the plane anyway. The main battery pack leads were shortened as much as possible and the 2 packs were wired together to be charged as a 10 cell pack. Keeping them seperate would have added another connector. The two packs are glued together with several pieces of 1/4" sq balsa to act as spacers. Total weight of the 2 packs with Deans connectors is 1263 gms.

After figuring out the appropriate position of the packs for balance, 2 alignment strips are glued to the bottom of each pack to lock them in place around the landing gear mount. Batteries are held in place with velcro cinch straps, shortened and cut thinner to fit and save weight. The cinch style strips are the easiest to fasten.

The receiver and receiver battery are held to the center bulkhead with self stick velcro.