at last check information on the PSU, etc., the manufacturer

I became aware of the PortaPow devices thanks to the magazine c't, because I have already been looking for a way longer to check current information from the manufacturers in power supplies, Car charger cables and batteries.

Many manufacturers high currents that neither understand nor prove Apps own accounts of capacity and charging time.

This is now finally concluded, the device is very accurate (minimal deviation in the 2nd decimal place) in comparative measurement on the work with laboratory instruments found. BUT for the price and for the minimum deviation Ideal.

Thanks to the PortaPow device I have now been found for the first device that delivers not even 50% of the power that the manufacturer promises. 0,36-0,45A instead 1-2,1A.