Robot Mower Not Charging? Find the Cause in 6 Checks

When a robot mower won't charge, the fault is usually outside the mower: power, cable, contacts or the station's position. These checks follow Navimow's charging guide and Dreame's support advice, and they apply to every brand. Work through them in order.

Tip: Switch off the power supply before cleaning contacts or checking cables, and stop or lock the mower as your manual describes before you handle it.

1. Is the station getting power?

Look at the station's indicator light. If it is off, the station has no power. Test the outlet with another device, try the station on a different outlet, and check any circuit breaker or switch on the circuit. Navimow lists this as the most common cause.

2. Check the cable and power supply

Use only the cable and power supply that came with the mower. Check that the extension cable is firmly connected at both ends and look along it for cuts or chewing; pets and wildlife damage these cables. If you use an extension, try connecting the power supply directly to rule it out.

3. Clean the charging contacts

If the station has power but the mower still doesn't charge, the contacts are the usual suspect. On Navimow stations a blue light with the mower docked means power isn't reaching it. Switch off the power, then clean the strips on the station and the contacts on the mower with a dry brush or cloth, removing grass, grime and corrosion. Navimow warns against alcohol, gasoline, acetone or other liquids.

4. Make sure the mower docks squarely

A station on a slope or a bump stops the mower sitting correctly on the contacts. Put it on flat, even ground with clear space: Navimow asks for about 6.5 ft in front and 1.6 ft on each side, and Dreame for an open, flat area within about 3 ft. Remove twigs, stones and toys, and trim overhanging branches.

5. Allow for temperature

Batteries are protected from charging when they are too hot or too cold. Navimow's mowers pause charging below 32°F or above 127°F battery temperature and resume between 37°F and 120°F; Lymow lists a charging range of 37°F to 134°F. On a hot afternoon, let the mower cool down in the shade before blaming the charger.

6. Consider the battery or hardware

If the station has power, the contacts are clean and the mower docks properly but still won't charge, the fault may be the station, power supply or battery. Ecovacs notes batteries typically last around 3 to 5 years, and that charging more often or taking longer is a sign of wear. Contact the maker's support with the serial number, the date and time it failed to charge, and a short video, as Navimow asks.

If your mower isn't reaching the station at all, see robot mower not returning to its charging station.