Pby37 Manual | Aukey

Cause: You are using a very low-power charger (e.g., an old 500mA iPhone cube). Fix: Use a wall adapter that outputs at least 5V/2A. The PBY37 requires a "strong" charger to finish the top 25% of its capacity.

This is straightforward, but the manual clarifies a few nuances. aukey pby37 manual

Port Specifications:

Can I charge two devices at once? Yes. The PBY37 supports dual charging. The total output is 5V/3.4A (17W). This is roughly 10W per phone. It will charge both slower than individually, but it works fine for overnight charging or topping up. Cause: You are using a very low-power charger (e

This is the most referenced section of any Aukey PBY37 manual. Next to the power button, there are 4 small white LEDs. Port Specifications:

Cause: Low-current mode is not on, or your phone has a damaged cable. Fix: Replace your charging cable. If that doesn’t work, double-check that the USB port is clean. Finally, try the double-press trick (even though your phone isn’t low-current, toggling the mode can reset the chip).