Can the car still be used if the battery is dead due to leaving the lights on?

[LeLeonardo]

If the car battery is drained because the lights were left on after the engine was turned off, you can start the vehicle by jump-starting it and then drive normally to recharge the battery. Alternatively, you can fully charge the battery first and then start the vehicle as usual. Methods for jump-starting: 1. Use another vehicle to jump-start your car. Connect the jumper cables to the corresponding positive and negative terminals of both car batteries. Start the donor vehicle first, then start the vehicle being jump-started. After starting, do not turn off the engine immediately; let it run for a while to recharge the battery. Otherwise, if you turn it off right away, the battery may still lack sufficient charge to restart the vehicle. 2. Use a portable jump starter or a car starter power pack. Connect the positive and negative terminals of the jump starter to the corresponding terminals on the car battery, then start the vehicle. 3. Contact your insurance company or professional roadside assistance to perform the jump-start. Alternatively, have the vehicle towed to a 4S shop or repair shop for jump-starting. Methods for recharging a completely drained battery: 1. Remove the battery from the vehicle and use a compatible battery charger to fully charge it. Then reinstall the battery and start the vehicle as usual. 2. Move the vehicle to a suitable location and use a dedicated battery charger directly connected to the battery. Plug in the charger and charge until the battery is full, then start the vehicle normally.