OBD2 ECU Memory Saver Cable – Battery Replacement Power Keeper

Keep Your Car's Memory Intact During Battery Replacement

Changing your car battery shouldn't mean losing your dashboard settings, clock, radio presets, or seat positions. The AER BT-30 OBD2 ECU Memory Saver Cable provides a continuous power supply to your vehicle's computer systems through the OBD2 port while you swap out the battery — no resets, no reprogramming, no frustration.

Made in Mainland China.

Why You Need This Tool

Modern vehicles store a surprising amount of data in their ECU and onboard computer — from digital clock settings and radio stations to memory seat positions, ABS calibration, anti-skid system data, and electric mirror preferences. Disconnecting the battery, even briefly, can wipe all of this. The AER BT-30 prevents that by maintaining a steady, safe power supply through the OBD2 port during the entire replacement process.

• ✅ Protects ECU memory — dashboard info, digital clock, audio settings, memory seats, ABS, anti-skid system, and electric mirror settings
• ✅ Easy OBD2 connection — plugs directly into your car's standard OBD2 port, no special tools needed
• ✅ Battery clip terminals — connect to an external 12V power source (power bank or second battery) to maintain voltage
• ✅ 75cm cable length — generous reach for comfortable use in any engine bay layout
• ✅ CE certified — meets required safety standards
• ✅ Saves time — no need to reprogram settings after a battery change
• ✅ Compact & lightweight — easy to store in your glove box or toolkit

Specifications

What's in the Box?

• 1× AER BT-30 OBD2 ECU Memory Saver / Constant Power Cable

Works Great Alongside These Products

For full vehicle electrical safety, check out our 10-Pack 22AWG Glass Tube Fuse Holders and our 100-Pack Disposable Nitrile Gloves — essential when working under the hood.

For more information on vehicle electrical safety and OBD diagnostics, visit the U.S. Consumer Product Safety Commission (CPSC) for safe automotive tool guidelines.

Learn more: On-board diagnostics

Frequently Asked Questions

Q: How does the AER BT-30 OBD2 ECU memory saver cable work?

A: The AER BT-30 plugs into your vehicle's OBD2 diagnostic port and connects via battery clips to an external 12V power source (such as a portable jump starter or secondary battery). This maintains a continuous low-level power supply to the car's ECU and onboard computer while the main battery is disconnected, preventing any stored settings or calibration data from being lost.

Q: What car settings does this memory saver protect?

A: It protects a wide range of stored settings including your digital clock, dashboard information, radio presets, memory seat positions, ABS calibration, anti-skid system data, electric mirror settings, and other ECU-stored parameters that would otherwise reset when the battery is disconnected.

Q: Is the AER BT-30 compatible with all vehicles?

A: This tool is compatible with most OBD2-equipped vehicles, which includes virtually all cars and light trucks manufactured for sale in the United States after 1996. Simply plug it into the standard 16-pin OBD2 port (usually located under the dashboard near the steering column) before disconnecting your battery.

Q: What external power source do I need to use this cable?

A: You need a stable 12V DC power source — a portable car jump starter, a second 12V battery, or a DC power supply will all work. Connect the battery clips (red to positive, black to negative) to your external power source, then plug the OBD2 connector into the port before disconnecting the car's main battery.