Editor’s Note: This article was updated on 2/10/2020 to include cold weather testing, as requested by our members. Find it below. -Chad
Dometic’s PLB 40 is a truly plug and play portable battery solution that allows anyone to have a dual battery system in any vehicle. That’s right – no custom wiring or additional purchases required. As long as you have a 12V outlet in your rig that can supply 100W, you can plug in the PLB 40 and enjoy an additional 40 Amp-Hours of power that can be used to power whatever you want. This means that you can power 12 V cigarette-style devices like an electric cooler, your USB devices, and two-pin 12V appliances without pulling from your vehicle’s starting battery.
Dometic certainly isn’t the first company to make a portable battery, but the ease of use and a few electric cooler-specific optimizations to the PLB 40 make it a great choice for folks who want to be able to use their electric coolers in just about any vehicle, or have a versatile...