ConRAD wrote:1. As I can see the "pass-through" option appears to be quite a controversial issue, to the point that the official opinion of an Anker engineer (competitor of RAV) is the following:
quote
we actually made the decision to remove this function from our portable chargers. When pass-through charging, if there is a difference between the output of the wall charger and the input of the device being recharged it can cause the portable charger to rapidly power on and off. This increases charging times for both the portable charger and your device, risks causing damage to the battery cells and can significantly shorten the portable charger's lifespan
unquote
2.: I also add that in the case the pass-thru option shouldn't be properly designed there's the real risk to pass to the output the same voltage instability that you might have at the input when supplying the power-bank not from a stable 5V-usb power suply but from an AC/DC dynamo converter
3.: These types of power-banks are indeed all designed to be charged via 5V-usb wall chargers and not via e-werk or things alike. Please don't forget that if you use an e-werk you have the chance to select the voltage output between 4.9V (too low) and 5.6V (too high)
I hear what you say, but my point is a user on this forum has reported success with charging the 26800mAh RAV battery. I know you mention the 4.9v and 5.6v of the e-werk, but why not get something that puts out 5v exactly? Just logically I would have thought there was an element of protection in these power packs, as there may well be variation in many 5v wall chargers. I remember seeing a website a while ago where they tested the voltage from a number of wall chargers, and very few were putting out a constant stable 5v. Apple was the notable exception.
As for the pass through issue, is pass through such an important feature? Why not charge your devices when sleeping at night. That way you always have devices with plenty of power of the morning.