Can you charge your phone and external charger at the same time?

[littlenoodles]

I'm looking into getting an external battery extender, but I'd like one that simplifies life rather than making it more complex. Ideally, the thing would combine a charger brick and battery, so I could charge it and the phone together at night and just throw the charger/battery thing in my bag in case I need it during the day.

But it looks like the devices available are just battery packs. Does this mean they need to be charged separately from the phone via their own charger bricks? Or can they at least be spliced in between the phone and the charger so everything gets charged at once?

 

[Waterdroid]

The Xiaomi Powerbank 10400mAh is one of the packs that support that feature, so-called pass-through charging. You can charge the powerbank while having your device plugged in and charged too.

 

[butterfly210]

Mophie... Pricy but worth it...