I tested the latest FW46.8 and today I went below 30% and at max. power display showed me 550-600W - 5 level. Under 20% 250-300W. Now I'm trying FW46.6 and I don't feel any difference. Less kicks at the start and at the 1st level, the power is max. 250W. Battery life also doesn't matter much. We will probably return to the original FW, 46.7 ...