The IndigoDUO is designed to be attached to mains power. If you are powering the IndigoDUO using the micro-USB cable, it is important to use a reputable USB adaptor which can provide at least 1.3A @ 5V DC.
The IndigoDUO also features an internal rechargeable battery that's used should external power be lost. Battery life depends on how it's configured (Report Frequency, GPS modes etc.).
Fully charge your battery before use.
The internal battery will recharge whenever the IndigoDUO is connected to either USB power or other external power source.
Input Voltage
8-32V DC input or 5V Micro-USB input, built-in backup battery.
Power Consumption
500mA max, plus very low current sleep mode (<30mA)
Backup Battery
3.7V Li-Ion Polymer 6.85Wh / 1850mAh
Backup Power
8 Hours / 1 minute Iridium Transmission