I often use also 12V consumers in the automotive area and have extra-tinkered me a cigarette port. Examples: Chargers, soldering iron, LED lighting, Navi.
What bothers me is on the device, the display jumps like something. Once you pull the power cord, the indicator falls from 100 to 96% with no cables connected / consumer. Charge cycles so far as 20th
A slightly smaller anchor battery (approx 15Ah) with only 4 LED for the charging indicator I like better because the bottom line. Sometimes less is more.
Very sad also be used, that even with the same manufacturer in DC and DC out different barrel connector. Here is a 4.0mm x 1.7mm out and in 5.5mm x 2.5mm, which has no compatibility with 5.5x2.1 (in other devices it works sometimes). In other anchors the situation is reversed, but here 2.1mm said. The improvised adapters so do not fit on both batteries and I have to keep different chargers on hand and be careful not to reverse the (damage?).
The IQ feature is great for to ladennde devices, but unfortunately it works then often not work properly if you connect other consumers to draw little power. A cordless screwdriver for example 5V or a 12V LED light with switcher. Sometimes the anchor emits no electricity and you have a kind of switch load consumers. So that my 12v cigarette lighter socket works, it had to be one that has installed a light bulb to illuminate. Otherwise the armature switches the 12V out not free. This also means that when consumers off but only the bulb can leersaugen the anchor.
Even my Ansmann 4 Pro for charging AA and AAA does not work because the anchor not switched to 12V. On the other Power Banks that works perfectly.
The fact that the ports are labeled under the device and not on top of it, is also a fact unnecessary.
Positive: 12V in and out are on the same side, that is, you can access all connections from only one direction. The smaller anchor I always take out of my pocket, if I want to load it.