There are other units in the market place that are similar in the fact that they are a capacitor designed to take load off the receivers bus system, much like the DC-UP does. Most of the units are 47µf to 250µf.  The (µ) stands for Micro, and the (f) stands for farad.  A farad is the unit of capacitance in the meter-kilogram-second system equal to the capacitance of a capacitor having a charge of 1 coulomb when a potential difference of 1 volt is applied, or in other words 1 unit of energy for a capacitor.   A Micro is used to denote that the measurement is 1 Millionth part. 

So the other units sold in the market today in lay-man's terms are 47 Millionth of a Farad to 250 Millionth of a Farad. 

The Fromeco DC-UP is 1.25f, in other words it stores a tremendous amount of power. We do this all in less than 1oz in weight, with a very small mounting footprint.

• Rated up to 8.4 volts
• Lowest achieved voltage indication.
• Radial Scale of 4 volts up to 8.4 volts
• Red LED's 4 volts up to 5 volts
• Blue LED's from 5 volts up to 8.4
• 1.25f capacitance