Here's another use for your blower. K&N makes air filters which you can wash and re-use; but you cannot use compressed air to dry them because you risk blowing out the cotton fibers between the fine mesh screen. So rather than waiting several hours, I fired up the trust ego blower at low speed, and then after putting the filter in front if it (blowing air into the filter), I hit the turn button to raise the air pressure. I found that holding the filter 1" from the nozzle was better than pressing it completely against it so that there wasn't excessive back pressure in the blower. Dried each one for about five minutes, and the 5.0 AH battery had plenty of juice left over (put it back on the charger and it was reading 3 bars off the bat.