Maintaining your vehicle’s computer memory during battery replacement is crucial, and an Obd2 Battery Memory Saver is the tool for the job. However, using a high current power supply for this purpose can lead to serious and potentially dangerous consequences. Understanding the risks and choosing the right equipment is essential for safe and effective car maintenance.
The Hidden Dangers of High Current Supplies
Connecting a high current power supply directly to your OBD2 port, intending to maintain power while swapping batteries, is a risky practice. Accidental grounding, even for a split second, can cause significant damage. This could range from blowing fuses to more severe issues like battery explosions or dangerously high heat capable of causing burns. The electrical system in your car is delicate and not designed for such high current inputs during memory saving procedures.
Opt for Low Current Battery Chargers: A Safer Approach
Instead of high current supplies, a low current battery charger is a far safer and more effective option. A charger like the NOCO G3500, with a maximum output of 3.5 amps, provides sufficient power to maintain memory without the risk of electrical overload. These chargers are designed for safe, continuous operation and are much more forgiving in case of accidental shorts. Using a low amp hobbyist power supply (around 1 amp) is another safe alternative, as it will simply drop voltage if a short circuit occurs, preventing damage.
Why Booster Packs Like NOCO GB40 Are Unsuitable
While jump starters like the NOCO GB40 are excellent for jump-starting a car, they are not ideal for OBD2 memory saving. These devices, designed to deliver hundreds of amps for starting engines, often have safety circuits that require a certain level of resistance from a battery to activate their output. When connected to an OBD2 port with a minimal load (like the car’s computer memory, around 70mA), the GB40 might behave unpredictably unless you engage an override function, which further increases the risk in this application.
Troubleshooting After a Potential Electrical Issue
If you’ve experienced a problem after using an inappropriate power source for OBD2 memory saving, the first step is to check your vehicle’s fuses. Many OBD2 ports are protected by a 7.5 amp fuse, which is likely to blow in an overcurrent situation. While a blown fuse might cause a fault code, it usually won’t disable the entire system. If you’re experiencing more significant issues, double-check your battery connections for proper contact and use a voltmeter to test the battery voltage at the posts and terminals to ensure a stable power supply.
