I rely on this 400-watt Wagan rescue battery when camping and during extended power outages. I don't need it very often, but I am sure glad I have it when I do!
Compact and simple to use, the Wagan Power Dome EX has a built in radio, work light, air compressor, inverter and jumpstart cables. I've used the inverter to great effect while camping. I have used the two AC outlets to charge or operate a myriad of cameras, tablets, phones and laptops. The compressor saved me on the side of the road in Baja. The jumpstarter saved a battery I had mistakenly drained last week.
I've been using the Power Dome EX for around 3 years. The battery is still very healthy. I am considering putting it on my pulse charger, just for fun.
Wagan Power Dome EX 400-Watt Jump Starter with Built-In Air Compressor