Review on 🔌 Skyocean 3 Socket Cigarette Lighter Splitter Power Adapter + 3 USB Car Charger 120W with Volt Meter, On/Off Switch – Cell Phone GPS Dash Cam & All Electronic Devices (Black) by Jared Stauder

It was exactly what I wanted. In case you are wondering which cup size is appropriate, as I do not know if there are different sizes for all cars. It fits perfectly where a large Subway mug might fit. Sorry I couldn't be math in the description. The box comes with a chart showing battery status in volt columns at ignition and run time. (NOTE: I cut out the chart and pasted it on the product to quickly see if the battery needed attention.) I thought this was an important consideration, knowing that some things can use a lot of power when charging. The buttons to turn off each DC outlet are very durable and feel like they're going to stay there forever. The small green ring indicator does not light up when the power switch is off. Don't quote me on that. My purpose of purchase was to power my GPS and dash cam and they work great with the TRI socket splitter. The digital voltmeter seems to be constantly active. Example: If the car is not moving, it will display a constant number. When the car accelerates, it expands slightly because the alternator is doing more work. If you drive at higher speed or RPM, the voltage will be higher. So the computer chip in this article is quite complex for $20.