The battery has a built-in temperature protection feature. Temperature protection will be activated at 0°C (32°F)/50°C (122°F), and the battery won't be charged unless the temperature reaches 5℃ (41°F) or above/reduces to 40℃ (104°F) or below.
Check whether or not the charging station is connected to a power supply. If not, insert the power plug into a suitable power outlet.
Check if the contact strip is clean. If not, clean it so that the contact strips on the mower and charging station can connect well.