YUANTUO 9V OBD-II 16-Pin Memory Saver for Cars — Plug-and-Play, Preserves ECU & Radio Settings

YUANTUO 9V Battery Powered Memory Saver plugs into any OBD-II 16-pin port to keep your car's electronic settings intact while the main battery is removed.

This compact memory protector provides a temporary 9V backup to maintain ECU, radio, clock, alarm and adaptive settings during battery replacement or maintenance. It’s a straightforward, plug-and-play tool designed for mechanics, DIYers, and fleet technicians working on vehicles equipped with a standard OBD-II 16-pin connector. No programming or wiring modifications are needed—just a single 9V battery (not included) and the OBD-II port.

How does the YUANTUO memory saver keep vehicle data when the battery is disconnected?

The device supplies a steady auxiliary voltage through the OBD-II port to the vehicle’s modules, preventing volatile memory loss during power removal. By maintaining that standby power, calibration values, radio presets, ECU learned parameters and convenience settings remain unchanged, so you avoid time-consuming reprogramming.

• Provides temporary 9V power via the OBD-II 16-pin connector.
• Prevents loss of radio, clock, and adaptive ECU data.
• Stops fault codes that arise from abrupt power loss during maintenance.

Is it easy to use this memory saver while changing a battery?

Yes—installation is intentionally simple: attach a standard 9V battery to the unit, then plug the connector into the vehicle’s OBD-II port. The unit is plug-and-play, so no tools, vehicle programming, or in-depth electrical knowledge are required.

• No soldering or splicing—connects directly to OBD-II 16-pin port.
• Works with a common 9V battery (sold separately) for quick setup.
• Small form factor lets you work around cramped engine bays.

Which vehicles and systems is this OBD-II memory protector compatible with?

The YUANTUO memory saver is built to interface with any vehicle that offers a standard OBD-II 16-pin diagnostic socket. That includes most cars, light trucks and SUVs sold since the late 1990s in regions that adopted the OBD-II standard, but always verify your vehicle’s port type before purchase.

• Fits all standard OBD-II 16-pin ports—no adapter required for compliant cars.
• Suitable for preserving ECU, BCM, radio, clock, and alarm memories.
• Not vehicle-model specific; ideal for mixed fleets and multi-brand shops.

What should you know about safety and limitations before use?

The memory saver supplies a low, temporary voltage and is intended only for brief maintenance tasks like battery swaps. It does not replace a dedicated battery charger or service tool and should not be used if the vehicle requires diagnostic or programming equipment for deeper electronic procedures.

• Do not use as a long-term power source or in place of a battery charger.
• Package does not include the 9V battery—use a fresh battery for best results.
• Follow vehicle manufacturer guidance when performing electrical maintenance.

Who is this for: The YUANTUO 9V OBD2 Memory Saver is ideal for professional technicians, mobile mechanics, and car owners who perform their own battery maintenance and want to preserve vehicle settings without reprogramming. It’s especially useful for busy shops, fleet maintenance teams, and anyone working on multiple vehicle makes that share the OBD-II 16-pin standard.