Maybe 10

I’ve bought 2 different backup Lithium batteries. The first one is Freedom battery which lasted less then one night . The second one I really like is the Maxoak K5 power bank which lasted me 5-6 nights with no humidity, and 2-3 nights with humidity. I love to go camping and worry about emergency pow...

I’ve tried 2 different batteries. The Freedom battery which lasted one night. They say 2, but that probably depends on the type of mask you have and other variables. The one I really like is the Maxoak K5 power bank which lasted me 5 nights. You can find both of these on Amazon. If you want consumer...

The higher humidity setting maybe help you