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In cold weather, when the car is not used for a long time, if the headlights or the radio are left on, the battery is discharged. Sometimes it does not start and may be discharged enough to not even light the engine light. In this case, you can charge your battery at home at least enough to start it. A laptop charger is needed. Since our battery is 12 V, the charger must be greater than 12 V. I used a 19.5 V charger. Higher ones can damage the battery. Do not charge it for a long time to prevent damage to the battery. I charged it for 7-8 hours and it was enough to start it. The battery will fill up as the car starts and drives around. For a full charge, it is necessary to take it to an auto electrician.