as JBMat commented...have a non powered backup...in 2004, we were expecting a high Cat 3 storm....I screwed plywood to the 23 windows of my old frame home .. my 12v cordless was not up to the task, and had to fall back on the old school method... for the younger set, that have never seen one of these... they are called "Yankee Screwdrivers" ... these were both made by Stanley... the helical cut rotates the shaft when pushed... an adapter allows use of TorX screws.... be careful, especially if if you have small kids that may handle them...., when the knurled nut is released, the spring loaded shaft flys out... might want to keep a look out at garage sales...they are pretty handy to have