Lightweight LiPo(wer)

If your project needs a strong, lightweight battery power source, this discounted
Great Planes lithium-polymer 3-cell battery pack
could do the trick. Rated at 11.1V 720mAh, this $27.99 battery pack is wired and ready to juice up and go. Tipping the scales at a lithe 1.85oz, it won't weigh you down, either. Tower Hobbies also carries a
Great Planes charger
for $24.99 that is ideal for charging these picky LiPo battery packs. You'll also need a 12V battery to supply the charger.—Dave Prochnow

(Image: Tower Hobbies)