# Rectifying Faults

Problem | Remedy
--- | ---
External USB device cannot be charged using the USB port. | A/B/C/D
Battery charge indicator (3 LEDs) is flashing quickly. Temperature of the battery is above the operating temperature range. / Battery adapter is overloaded. | B/C

A | Charge the battery.
B | See details in "Technical Data". Some external USB devices cannot be charged with this battery adapter despite being consistent with the technical data.
C | Remove the battery (4) from the battery adapter (1) and re-insert. If necessary, allow devices to cool down.
D | Connect the charging cable of the external USB device to the USB port (3) on the battery adapter (1).