In Battery mode, when battery power is low, the LED will flash RED twice every second. In this case, please charge Priva II.
You can charge / power Priva II regardless of Battery mode or DC mode via the supplied micro USB cable to your own USB chargers (wall charger/travel charger, etc.) with 5V/500mA~2A, or PC/TV USB port.It's ok to use most mobile phone chargers on the market.
The Red LED will stay on until it’s fully charged.
Tips: In DC mode, you can connect Priva II to your USB charger all the time.