Think the old “Motorola Brick Phone” from the late 1980’s versus today’s I-Phone. (PCS) battery fuel gauges change that paradigm. The Pro Charging Systems (PCS) Battery Fuel Gauge solves one of the most common complaints about battery status indicators currently on the market- that most battery status indicators are not accurate or reliable. Dual Pro Battery Fuel Gauge - Marine Dual Read Battery Monitor - 12V/36V System - 15' Battery Cable Product Descriptionīattery Fuel Gauge - Marine Dual Read Battery Monitor - 12V/36V System - 15' Battery Cable