Overview

What You’ll Need

1. Bad Elf Flex→
2. Mini-B USB cable→
3. Wall wart power adapter→

Charge the Bad Elf Flex

1. Charge your Bad Elf Flex using the supplied USB wall power adapter and Mini-B USB charging cord.
2. Wait for the Bad Elf Flex to fully charge, indicated by the left LED turning solid green.
   

You can operate your Bad Elf Flex while it is charging. Connecting to a power source of 5V/2.4A or greater sustains unlimited operation regardless of the charge state when paired with a high-quality USB cable

We recommend using the Mini-B USB cable and wall wart power adapter linked above.  However, if you choose to use your own charger and cable, we recommend they support 18W of power output for optimal charging times. Do not use a power adapter with an output of below 10W.

Left LED: Power Status Chart

Color	Meaning
Solid Green	Fully charged
Pulsing Green	Charging, battery > 75% ~2.5 sec interval ⇒ high current charging source
Pulsing Green	Charging, battery > 75% ~5 sec interval ⇒ low current charging source
Pulsing Red	Charging, battery < 75% ~2.5 sec interval ⇒ high current charging source
Pulsing Red	Charging, battery < 75% ~5 sec interval ⇒ low current charging source
Fast Red	Charging, USB power source not usable ⇒ invalid or low current charger
Fast Red	During normal operation without USB power ⇒ battery low
Fast Yellow	Battery temperature out of range for charging
Purple	On-the-go (OTG) port in use
None	Not charging

Battery Specs and Temperature Limitations

Charging only occurs within the valid temperature range defined below. Battery temperatures outside the listed charge temperature range prevent the Bad Elf Flex from charging to protect the battery.

The battery temperature may differ from the ambient air temperature as internal temperatures vary during usage.

Internal Battery	Non-replaceable 3.7VDC, 12000mAh, Lithium ion
Battery Life	11 hours in RTK, SBAS, or autonomous modes  7 hours with L-Band corrections enabled
External Power	Mini-USB power input from 10W or greater USB power source
Temperature	Operating: –20°C to +55°C (–4°F to +131°F)  Storage: –40°C to +75°C (–40°F to +167°F)
Recommended   Power Adapter   Specs	DCP Max   Input: 100V to 240V  Output: 3.6V to 6.5V/3A, 6.5V to 9V/2A, 6V to 12V/1.5A

Charging System Information

View charging system info under the Global device settings > Charging System Information.

            

1. Actions
1. Press the enter button to show the charging system details.
2. Press the back button to return to the settings menu.
   

Text Shown	Meaning
No Input	No charging input provided
USB SDP	USB standard downstream port (500mA)
USB CDP	USB charging downstream port (1500mA)
USB DCP	USB dedicated charging port (1500mA)
DCP Max*	Dedicated charging port (12V/3000mA)
Unk (500 mA)	Unknown adapter (500mA max)
Non-std	Non standard adapter – not recommended
OTG	On-the-Go cable attached

*Recommended configuration

Battery Safety

1. To prevent injury or damage:
1. Do not charge or use the product if it appears to be damaged or leaking.
   
2. Charge the product only with an approved USB power source that can provide at least 2400mA of charging current at 5V.
3. Discontinue charging a battery that gives off extreme heat or a burning odor.
4. Use the product only for its intended use.

Troubleshooting

Slow charging or fails to charge

1. We recommend using the charger provided with the Bad Elf Flex, the Wall wart power adapter→.
2. Look at the label on your USB charging source. Ensure the power adapter and cable supports either 5V/3A, 9V/2A, or 12V/1.5A.
   
3. Try another power source. Avoid charging from a computer USB port or other low power source.
4. Use a different high-quality USB cable (thicker cables generally handle higher charge rates).
5. On the Bad Elf Flex LCD, under Global device settings in the Charging System Information screen, confirm the receiver is detecting a high-power power adapter:
1. A good charger will display “Fast Charge” under “Charging Status”.
   
2. A good charger will display "USB DCP" or "DCP Max" under "Charging input".
3. If the status displays “Slow” or “Low Power”, try a different power adapter.
   
6. Inspect the charging port for dirt, debris, or damage.
7. Inspect your cable for damage and loose connectors.
8. If outdoors, let the Flex cool or warm if temperatures are extreme (charging pauses outside the safe temperature range).

If the Flex was completely drained, the battery percentage may take extra time to update after charging begins.

Let unit completely power down and try charging again.

Bad Elf Flex shuts down unexpectedly

No LED activity while plugged into power

Need Help?

1. The stamp or printed label on the wall charger showing its output voltage and current (example: Output 5V/1.5A or higher)
   
2. The cable you are using
   
3. The Charging System Information screen (Settings → Charging System Information)
   

A clear photo of the charger stamp is often enough for Bad Elf Support to identify the problem immediately.

1. Email: support@bad-elf.com
2. Explore: Bad Elf Flex Documentation →