RE: Making my own battery
I just made LI-Ion battery packs for my new 35% Extra and my older 50CC Yak.....easy to do, no problems and my Yak is at 4 weeks without a charge flying 2 or 3 flights a weekend. Still holds over 7 volts with a 1 amp load....down side to Li-ions is a voltage regulator or a power expander like a Smart Fly EQ-6