Xiaomi Portable Car Air Pump 2 User Guide

Wireless Air Pump 2 Automotive Inflator User Manual in English

(!) Warning
Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury. Keep all warnings and instructions for future reference.

Device Overview

(!) Note: The product illustrations, components, and user interface shown in this user manual are provided for reference only.

Parts Description

1. Schrader valve
2. High-pressure air hose
3. Hose compartment
4. Light indicator
5. Air hose connector
6. Display
7. “+” button
8. Power on/off button
9. “-” button
10. Battery level indicator
11. Charging port
12. Mode button
13. Start/stop button
14. Heat dissipation vent

Accessories

1. Presta valve adapter x 1
2. Presta needle adapter x 1
3. Charging cable x 1
4. Storage pouch x 1

Safety Instructions

The pump produces a noise level of 75 decibels. Please take appropriate precautions to protect your hearing. The pump and air hose may become very hot after extended operation. Do not touch hot surfaces until they have cooled down. This product is not a toy and must not be used by children.

1. Battery Level and Charging Indicator

Battery Level Indicator

The battery level indicator displays different colors to show the remaining battery charge:

White: above 50%
Orange: 20% to 50%
Red: below 20%, please charge as soon as possible

Charging

Fully charge the pump before first use.

Connect the charging cable to a certified USB charger (5.0V 2.0A, sold separately) to charge the pump.

Battery level indicator during charging:

Flashing white: charging
White: battery fully charged

(!) Note: The pump cannot be used while charging.

2. Turning On the Pump

Remove the high-pressure air hose from the compartment, and the pump will automatically turn on.

If the pump is not used for 3 minutes, it will automatically turn off.

If the pump turns off automatically after removing the air hose, press and hold the Start/Stop button to turn it back on.

3. Connecting the High-Pressure Hose to the Nozzle

Schrader Valve

Schrader valves are used for car, motorcycle, bike, and most mountain bicycle tires.

For inflation: the pump can be directly connected to the Schrader valve to start inflation.

For deflation: use an appropriate tool to press the valve pin and release air.

Presta Needle Valve Adapter

To inflate balls such as basketballs and footballs, use the included needle valve adapter.

For inflation: screw the needle valve adapter onto the Schrader valve connector, then insert the needle into the ball’s valve to start inflation.

For deflation: insert the needle valve adapter into the ball valve and gently press to release air.

Presta Valve Adapter

Road bicycles and some mountain models use the Presta valve, which requires the included adapter.

For inflation: unscrew the Presta valve ring, attach the adapter to the air hose, and connect the pump to the tire valve to begin inflation. After inflation, tighten the valve ring again.

For deflation: loosen the Presta valve ring and press the valve core to release air.

4. Measuring Air Pressure

The current pressure will automatically display once the air hose is connected to the item when the pump is powered on.

5. Determining Correct Air Pressure

To ensure safety and prevent injuries caused by burst items due to over-inflation, always refer to the instructions or labels attached to the item to be inflated to determine the correct pressure before use.

Tires

The recommended pressure for car, bicycle, and motorcycle tires is indicated on the tire sidewall. For cars, this information can also be found on the driver’s side door.

For detailed information regarding load capacity and recommended air pressure, refer to your vehicle’s manual.

Balls

The recommended air pressure for footballs, basketballs, volleyballs, and other balls is indicated near the air valve.

Air Pressure Reference Table

(!) Note: The pressure range values are for reference only. Always refer to the instructions or user guide for the specific item to be inflated to obtain accurate pressure data. (The above data are provided by QiCycle Laboratory.)

6. Pressure Presets

Mode Switching

Press the “Mode” button to switch between five inflation modes. Select your preferred air pressure unit before inflation. Press and hold the mode button to toggle between pounds per square inch (psi) and bar.

Manual mode: user-defined preset pressure (pressure value and unit will be saved)
Adjustable range: 3 - 150 psi

Bicycle mode: default 45 psi
Adjustable range: 30 - 65 psi

Motorcycle mode: default 2.4 bar
Adjustable range: 1.8 - 3.0 bar

Car mode: default 2.5 bar
Adjustable range: 1.8 - 3.5 bar

Ball mode: default 8 psi
Adjustable range: 4 - 16 psi

Adjusting Preset Pressure

After selecting the mode, press + or - to increase or decrease the preset pressure value. Press and hold the + or - button to adjust the pressure value quickly.

When setting the target pressure, the flashing value indicates the target pressure, while the steady value indicates the real-time pressure.

Lighting Indicator

Press the light power button to turn the pump light on or off. The light provides illumination in dark conditions, making it easier to connect the air compressor to a valve.

7. Inflation

Starting Inflation

Press the Start/Stop button to begin inflation. The current pressure is displayed in real time during inflation. The pump may generate noise between 75 and 80 dB during operation. Please take suitable precautions to protect your hearing. The pump and air hose can become very hot after prolonged use. Avoid long skin contact with the hose to prevent injury.

Completing Inflation

Once the preset pressure value is reached, the air compressor automatically stops inflation. The pump can also be stopped manually at any time during operation by pressing the Start/Stop button once.

(!) Caution!
Items such as balloons, beach balls, and swimming rings cannot be inflated automatically because their required pressure is below the pump’s minimum pressure range.
Inflate such items manually with care.

Battery Information

The pump’s battery operates for approximately 30 minutes on a full charge without load at an ambient temperature of 25 °C. Using the pump under heavy load or at lower temperatures may reduce battery life.

8. Disconnecting the Air Hose

The air hose may become extremely hot after inflation. To avoid injury, handle it carefully when disconnecting from the valve. A small amount of air may escape when the compressor is detached.

To prevent pressure loss, disconnect the air hose quickly from the valve.

9. Turning Off the Pump

Insert the air hose back into the storage compartment to turn off the pump. Press and hold the Start/Stop button while the pump is on. If the pump is not used for 3 minutes, it will automatically power off.

Precautions

• The pump is intended for use only by individuals aged 16 or older. Keep children at a safe distance.

• The pump contains a built-in lithium battery, which must never be incinerated or improperly disposed of. Do not expose the battery to high temperatures, such as leaving it inside a vehicle under direct sunlight. Exposure to heat, impacts, or water may cause fire, spontaneous ignition, or explosion.

• Do not store the pump at temperatures below -10 °C or above 45 °C. Exposure to excessive heat or cold will reduce the compressor’s lifespan and may damage the built-in battery.

• Prolonged inactivity may damage the battery. It is recommended to charge the air compressor at least once every three months.

• The pump uses a built-in DC motor that may generate electrical sparks during operation and must never be used in flammable or explosive environments.

• If the pump makes unusual noises or overheats during operation, turn it off immediately.

• Always verify the correct air pressure unit before setting the pressure to avoid accidents such as tire bursts. Common unit conversions: 1 bar = 14.5 psi, 1 bar = 100 kPa.

• Always supervise the pump while in operation. Never leave it unattended during use without preset pressure to avoid over-inflation.

• Use the pump only in a clean, dry environment. Dirt and dust can damage the air compressor. The pump is not waterproof and must never be washed with water.

Maintenance and Service

1. Regular cleaning, maintenance, sharpening of tools, lubrication, and recharging at least once every three months.

2. Servicing by the manufacturer or an authorized agent only.

3. List of user-replaceable parts: high-pressure air hose and Schrader valve, Presta valve adapter, needle valve adapter, and charging cable.

4. Special tools may be required. Do not disassemble or repair the device yourself.

Troubleshooting

Low Inflation Speed

1. Check if the battery level is sufficient.

2. Inspect for air leaks in the hose.

3. Ensure both ends of the hose are securely connected.

4. Check for air leaks in the inflatable item.

The Pump Turns On but Does Not Inflate

1. Make sure the air hose has been removed from the storage compartment before use.

2. Check that the battery level is sufficient.

3. Ensure the item’s required pressure does not exceed the preset value.

Unable to Adjust Preset Pressure

Ensure that the correct mode is selected. Manual mode shows a blank display without icons and allows adjustment within the range of 3 - 150 psi.

The Pump Inflates Normally but Displays Zero Pressure

Low-pressure items, such as balloons, have pressure levels too low to be measured.

The Pump Shuts Off After Connecting the Air Hose

Press and hold the Start/Stop button to turn the pump back on.

Air Leakage During Hose Connection

Ensure the air hose is securely connected.

Battery Indicator Color Differs During Inflation and Standby

The lithium battery voltage drops significantly during discharge, causing the indicator color to vary between inflation and standby. This is normal.

Technical Specifications