You can leave a Battery Minder hooked up, battery still connected, and not worry about power outages. I have them hooked up to two ATVs, JD 750 tractor, two antique cars, a commercial zero turn mower and my Honda EU 3000is, year round and in the neck of the woods where my sticks and bricks is located, power drops out 3-5 times per year. Never an issue...they don't need a "start" command, you plug them in and they start "minding" the battery...the power coming back on after an outage is the same as plugging it in. BTW, our other daily driver is sitting in the drive with its Battery Minder hooked up since we've already gone to our winter haven here in Arizona and won't be returning until sometime in May...