Very surprised that a 3.6v vacuum can deliver such strong suction Follow the instructions and charge for 10 hours before first use and last clean the filter. I just wanted to use this for crumb control in the kitchen. But I've found myself using it everywhere. I live in South Florida and it's so nice to be able to just take it with me for a quick clean instead of lugging around my big vacuum that puts out a lot of hot air. I haven't tested the battery life, but I've used it for 10 minutes here, 20 minutes there, and it hasn't run out of juice yet. Worth a good $20.