How to Use a Flextail Zero Pump with USB-C Battery

Quick answer

Use the Flextail Zero Pump with USB-C battery to quickly inflate your sleeping pad, prevent moisture buildup, and save breath. Follow the steps below for correct use and care.

Step-by-step guide to inflate and deflate

1. 1. Charge the pump fully before your trip: Plug the USB-C cable into any standard USB power source until the indicator light turns solid. A full charge takes about 1.5 hours and will inflate several pads. Do not rely on a partial charge—always confirm the battery is full before heading into the backcountry.
2. 2. Attach the correct nozzle to your pad valve: The Flextail Zero Pump comes with multiple adapters. Select the one that fits your sleeping pad’s valve (most common is the flat nozzle for twist-lock valves). Push it firmly into the valve until it seals. Double-check the adapter is secure—an air leak will significantly slow inflation and drain the battery faster.
3. 3. Set the pump to inflate mode and turn it on: Press the power button once (if your model has a switch, slide it to the ‘inflate’ position). Hold the pump steady against the valve. The pad should fill in roughly 30–60 seconds depending on pad volume. Avoid tilting the pump—breaking the seal will cause the pump to run longer and waste battery life.
4. 4. Stop inflating once the pad feels firm: When your pad reaches your desired firmness, turn off the pump and remove the nozzle. Immediately close the valve to prevent air from escaping. Over-inflating puts stress on the pad’s seams. Stop when the pad feels supportive but not rock-hard.
5. 5. To deflate, switch to deflate mode or use the reverse function: Some models have a deflate mode; if not, simply attach the nozzle to the valve and let the pad’s valve open to release air. You can also use the pump in reverse (check your model’s manual) to suck air out quickly. If your pump does not support active deflation, open the valve fully and roll the pad to force air out manually.
6. 6. Clean the pump after use and store it dry: Wipe the exterior with a dry cloth. Remove any debris from the nozzle. Keep the pump in a dry place away from extreme heat or cold. Moisture inside the pump can damage the electronics. Never immerse it in water or use it in heavy rain.

Product feature you’ll use

• Flextail Zero Pump w/ USB-C Battery: The Flextail Zero Pump is crafted to be the lightest and tiniest outdoor pump, designed to trim down pack weight. You can carry it without noticing the weight, making it ideal for ultralight backpacking where every gram counts.