Xiaomi 4 Pro (2nd Gen) and Scooter 5: won't charge, or the thermometer icon is lit

You plug in your Xiaomi 4 Pro (2nd Gen) or Xiaomi Electric Scooter 5 and the battery level doesn't rise, or the dashboard shows a thermometer icon and the scooter feels sluggish. Both models share the same causes: a faulty adapter, a battery that's too hot or too cold, low temperature protection, or a battery that was left flat too long (4 Pro 2nd Gen FAQ, Scooter 5 FAQ). The short answer: test the adapter on its own, bring the scooter to room temperature, and only then suspect the battery.

Most likely cause

On these models the most common reason is temperature. The thermometer icon means the battery is too hot or too cold, and charging is blocked until it returns to its normal range. Low temperature protection stops charging below 2°C and lets it resume at 5°C (4 Pro 2nd Gen FAQ). A scooter brought in from a cold garage can sit on the charger and do nothing until it warms up.

Other causes to rule out

• A faulty adapter: plug the adapter into the wall without the scooter. Green is normal. Red or no light means the adapter should be replaced (Scooter 5 FAQ).
• Adapter green while connected: red on the adapter means charging and green means not charging. If it stays green while plugged into a cold scooter, move the scooter somewhere warmer and try again (4 Pro 2nd Gen FAQ).
• Over-discharge: a scooter left unused and uncharged for a long time may have an over-discharged battery, which Xiaomi sends to after-sales service.
• Heat after a ride: the same icon appears when the battery is too hot. Let it cool before charging.

How to confirm

1. Plug the adapter into a working wall outlet with nothing else connected. Note the light colour.
2. Check the scooter's charge port, under the rubber flap on the tilted tube above the deck. It should be clean and dry. See check your charger.
3. If the thermometer icon is lit or the room is cold, bring the scooter indoors and leave it for a few hours before charging.
4. Connect the adapter. Red means it's charging. Green on a warm scooter, with a battery that isn't full, points to the battery or the scooter side.
5. Think about storage. Store at about 80 percent for breaks over 30 days and fully charge every 1 to 2 months (Scooter 5 FAQ). A scooter that sat flat for months is the over-discharge case.

Fix options

Warm it up or cool it down (easy)

The Scooter 5 charges between 0°C and 45°C. Charge indoors at room temperature and the icon should clear on its own.

Replace the adapter (easy)

If the adapter shows red or no light on its own, replace it. Use only an adapter made for your model.

Battery service (pro)

If a good adapter on a warm scooter still won't charge, or the battery was over-discharged, Xiaomi's route is after-sales service through the Xiaomi contact page. Don't open the deck to reach the battery yourself.

Parts

• E-bike charger (the Xiaomi adapter for your model)

When to get a pro

Get help if a good adapter won't charge a warm scooter, if the scooter sat flat for months, or if you see heat, swelling or a smell. See battery won't charge, store your battery for winter, e-bike battery care and when to call a pro.

Sources

• 4 Pro 2nd Gen FAQ, mi.com
• Scooter 5 FAQ, mi.com
• Xiaomi contact page, mi.com

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