YUANTUO 9V Memory Saver for OBD-II 16‑Pin — Battery‑Powered Car Memory Protector, Plug‑and‑Play

YUANTUO 9V Battery Powered Memory Saver plugs into any OBD-II 16‑pin port to maintain vehicle electronic settings while the main battery is removed.

When you remove or replace a car battery, modern vehicles can lose radio presets, ECU adaptations, clock settings, immobilizer data and other stored configurations. The YUANTUO memory saver is a compact, plug‑and‑play adapter that uses a standard 9V battery to supply backup power through the OBD‑II connector, preserving internal memory so you avoid reprogramming and reduce shop time.

How does the memory saver keep my car settings when I change the battery?

The device provides a stable, low‑current supply from a 9V cell into the vehicle’s OBD‑II power pins, trickle‑feeding electronics that retain configuration and learned parameters. It bridges continuity between the vehicle’s modules and prevents volatile memory clearance during battery disconnects.

• Plugs into the OBD‑II 16‑pin port used for diagnostics.
• Powers control modules with a single 9V alkaline or rechargeable battery (battery not included).
• Designed for stable low‑draw output to preserve volatile memory safely.

Which cars will this YUANTUO memory protector work with?

The adapter is compatible with any vehicle that has a standard OBD‑II 16‑pin diagnostic socket. That includes most cars and light trucks built for markets that adopted the OBD‑II standard. It is intended for models that rely on the OBD‑II connector for access to power pins.

• Works with gasoline and diesel passenger vehicles equipped with OBD‑II ports.
• Not dependent on vehicle make—fits the universal 16‑pin layout.
• Check your owner’s manual if the OBD‑II port location is unknown.

How easy is it to install and use during battery service?

Installation is straightforward: insert a 9V battery into the memory saver, plug the unit into the vehicle’s OBD‑II socket, then safely remove the main battery. No tools, programming steps, or special training are required for basic use, making it useful for DIYers and professionals alike.

• Simple plug‑and‑play: battery into the unit, then insert into OBD‑II port.
• No wiring or adapters required for standard OBD‑II ports.
• Compact design fits most cramped dash or footwell OBD locations.

What precautions and limitations should I know before using it?

While the memory saver maintains volatile data, it does not replace the vehicle’s main battery for high‑current tasks. Always follow safety guidance: use a fresh 9V battery, confirm correct OBD pin alignment, and avoid prolonged use beyond recommended durations stated by the vehicle manufacturer.

• Package does not include the 9V battery—install a fresh battery before use.
• Not suitable as a starter or high‑current supply; intended only for memory retention.
• Disconnect when maintenance is complete and reattach the main battery per normal procedure.

Who is this for? The YUANTUO 9V OBD‑II Memory Saver is ideal for technicians, auto electricians, and car owners who want a quick, reliable way to preserve electronic settings during battery replacement, diagnostics, or long‑term storage. If you change batteries, perform ECU work, or value saving the time required to reconfigure vehicle systems, this compact OBD‑II powered memory protector provides a low‑cost, easy‑to‑use solution that fits any vehicle with a standard 16‑pin diagnostic port.