Does anyone know of a USB power bank that will allow charge through?
In other words, one that will allow you to charge a device while the power bank is plugged in and charging?
Most will do either charging of a device or charging of the power bank, but not both at the same time.
I’d like to have one for my ForeFlight Ipad in the 340. That way I could plug the battery bank into the plane, and the Ipad into it and keep both charged and have backup if the charging port goes wonky..