12V OBD II Car Battery Memory Saver – Cigarette Lighter Extension

Never Lose Your Car's Memory Settings Again

Replacing your car battery shouldn't mean resetting every radio station, clock, and ECU setting from scratch. This 12V Car Cigarette Lighter Extension Cable with Crocodile Clip & OBD Socket Plug is your ultimate emergency power companion — keeping your vehicle's computer memory alive while you swap out the battery safely and confidently.

Made in Mainland China.

Why You Need This Emergency Power Kit

When a car battery dies or needs replacing, the vehicle's onboard computer (ECU), radio presets, clock, and other electronic settings can be wiped instantly. This clever device acts as a backup 12V power source that bridges the gap — drawing power from another car's cigarette lighter socket or any 12V DC source and delivering it through a 16-pin OBD II port to keep your car's memory intact throughout the battery swap.

Key Features

• Extra-Long 3-Meter (10ft) Cable — Significantly longer than the standard 3–5 ft cables on the market, giving you plenty of reach between two vehicles or a 12V power source.
• Gold-Plated OBD II Pins — Superior contact reliability and electrical transmission compared to typical galvanized metal pins, ensuring a stable, uninterrupted power supply.
• Universal 12V Compatibility — Works with any DC 12V power source: another vehicle's cigarette lighter socket, a 12V lead-acid battery, or an emergency jump starter.
• Crocodile Clip Connecting Wire — Provides an additional connection option for direct battery or auxiliary power terminals.
• Plug-and-Play Design — No technical expertise needed. Insert the cigarette lighter plug into the donor vehicle, connect the OBD plug to your car's OBD II port, and replace the battery worry-free.
• Emergency Backup Power — Perfect for roadside situations when you don't have a jump starter on hand.

How It Works

1. Connect the cigarette lighter plug to a 12V power source (another car, portable battery, or lead-acid battery via crocodile clips).
2. Plug the 16-pin OBD II connector into the OBD port of the car whose battery needs replacing.
3. Disconnect and replace the old battery — your ECU memory, radio presets, and settings remain safe.
4. Reconnect the new battery and remove the device. Done!

Specifications

• Voltage: 12V DC
• Cable Length: 3 meters (approx. 10 feet)
• Connector Types: Cigarette lighter plug + OBD II 16-pin plug + Crocodile clips
• Pin Coating: Gold-plated OBD pins
• Batteries Required: No
• Brand: Aermotor

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For more information on vehicle electrical safety and battery handling, visit the U.S. Consumer Product Safety Commission (CPSC).

Learn more: Electrician

Frequently Asked Questions

Q: What vehicles is this 12V OBD II memory saver compatible with?

A: This device is compatible with any vehicle that has a standard OBD II (16-pin) port and a 12V electrical system — which covers the vast majority of cars, trucks, and SUVs manufactured after 1996. Always verify your vehicle's OBD port location before use.

Q: Can I use this without a second car? What other 12V sources work?

A: Absolutely. In addition to another car's cigarette lighter socket, you can connect via the crocodile clips to any 12V DC lead-acid battery, a portable power station with a 12V output, or a dedicated 12V emergency jump starter. The 3-meter cable gives you plenty of flexibility for various setups.

Q: Will this protect all my car's settings when replacing the battery?

A: Yes — as long as a stable 12V power supply is maintained through the OBD II port during the battery swap, the vehicle's ECU, radio presets, clock, window calibrations, and other electronic memory settings should be preserved. The gold-plated OBD pins ensure a reliable, low-resistance connection throughout the process.