During this "COVID Home Isolation Time" my JEEP starts about once a week. As a result my battery is not dead but too weak to start my car. "Suction power", "Weather resistance" are independent of the main function of this product. Yes, "Shit" is very good. This solar panel charger is, as we say, still hooked up to my 2001 Jeep Grand Cherokee L6 4.0 in hopes that one day I'll go kinky and it'll boot up successfully.