VSTM OBD II Vehicle ECU Emergency Power Supply Cable Memory

VSTM OBD II Vehicle ECU Emergency Power Supply Cable is a 3-meter memory saver that feeds constant 12V to your car's OBD‑II port so you can change the battery without losing ECU settings.

When a vehicle battery is disconnected, many modern cars lose stored electronic settings, radio codes, learned transmission adaptations and other ECU data. The VSTM memory saver creates a temporary, stable 12V feed from a jump starter, another vehicle’s cigarette lighter, or a DC power source so those values remain unchanged while you replace the battery. Its long 3‑meter cable and heavy‑gauge wiring make placement flexible and connections safe.

How does the VSTM memory saver keep my car’s electronics intact?

The cable plugs into the car’s OBD‑II port and supplies continuous low-current 12V to the vehicle computer while the main battery is disconnected. That uninterrupted power preserves stored codes, radio presets and adaptive settings so you won’t need to reprogram devices after installation.

• Direct OBD‑II connection maintains ECU memory during battery swap.
• Works with any 12V DC source: jump starter, another car, or lead‑acid battery.
• Gold‑plated OBD pins for reliable contact and improved conductivity.

Is this cable safe to use and what protections are built in?

VSTM included multiple safety features to reduce the risk of electrical damage during use. A fast‑blow 8A fuse interrupts the circuit if current exceeds safe limits or voltage rises above 14V, protecting both the cable and your vehicle’s ECU. The heavy 6AWG copper conductors handle normal and transient currents without melting.

• 8A fast‑blow fuse cuts power within 0.1 seconds on overload.
• 6AWG pure copper wiring resists overheating and high inrush currents.
• Gold‑plated OBD pins minimize contact resistance and corrosion.

How do I use the VSTM cable with another car or a jump starter?

Connect one end of the cable to the target vehicle’s OBD‑II port and the other to your 12V source. If using another car, plug the cigarette lighter adapter into that vehicle’s 12V socket; if using a jump starter, use the device’s 12V outlet. Once the memory saver is powered, you can safely remove and replace the battery without losing settings.

• Insert OBD‑II plug into the vehicle needing the battery replacement.
• Attach cigarette lighter plug to donor car or plug into a jump starter 12V output.
• Ensure fuse is intact and monitor voltage; replace battery while power remains connected.

What makes the 3‑meter length and construction practical?

The 10‑foot (3m) cable gives you the reach to position a donor car or jump starter conveniently while working in cramped engine bays or driveways. The longer lead eliminates the need to move either vehicle into awkward positions and allows the cigarette lighter of a healthy car to remain accessible for power.

• 3 meters of cable allows flexible donor vehicle placement and workspace access.
• Sturdy connectors and strain reliefs reduce wear at plug points.
• Durable insulation protects wiring from abrasion and engine‑bay exposure.

Who is this for: The VSTM OBD II memory saver is designed for DIY mechanics, mobile technicians, fleet maintenance teams and car owners who frequently replace batteries or work on vehicles with sensitive electronic systems. It’s especially useful for late‑model cars that require continuous ECU power to retain programming, for roadside battery swaps where a portable jump starter or another car is the only available power source, and for anyone who wants a safer, cleaner alternative to bridging battery terminals.