Other World Computing (OWC) and Newer Technology (NewerTech) today announced the NuPower high-capacity replacement batteries for 14-inch iBook G3s and G4s. The new 59 Watt Hour battery model is available for US$119.99 and provides up to 12 percent more capacity than the original Apple stock battery. At $139.99, the 71 Watt Hour model provides up to 29 percent more capacity.