No, it won’t drain overnight if you disconnect the positive lead.
- Should I Disconnect the negative terminal of my car battery?
- Once you disconnect either terminal, there is no circuit for the car to drain the battery. I would recommend disconnecting the negative terminal, as you are less likely to short to ground when you loosen or tighten the terminal. No.
- Is it safe to disconnect a battery during the night?
- Disconnecting the positive (or negative if you want less risk of shorting tools to chassis) terminal during the night often gets around most discharging problems but would have little effect if the battery itself is self-discharging internally which sometimes happens.
- Is it possible to disconnect a positive terminal?
- Nope as there’s no circuit. But never, ever disconnect the positive. Disconnect the negative (unless you have a positive earth classic but in that case you already know). If you try and loosen the positive terminal with a spanner and it touches the body of the car then bad things will happen.
- What happens if you disconnect the battery and the car conks out?
- Even the initial premise was wrong. If you disconnect the battery and the car conks out, you don’t know if it conked out due to insufficient alternator current, or whether the resulting transients caused your ECU (the car’s computer, which controls fuel mixture, timing, and much more) to spit out bad data, shutting down the car.
Does disconnecting battery damage?
Warning: Regardless of the year, make or model of vehicle, never disconnect the battery while the engine is running or the ignition is on. Doing so can create a high-voltage spike in the electrical system that may damage electronic modules and/or the charging system.
- What happens if you disconnect your car battery?
- While disconnecting the battery is the most common method of resetting your computer, it’s not always the best way. That’s because disconnecting the car battery causes your computer to lose its memory. So, things like your preset radio stations, shift points, and your car’s ideal fuel/air mixture are forgotten.
- Is it OK to disconnect the battery from the controller?
- Daniël Boekel (Victron Energy Staff) answered · Sep 02 2019 at 4:58 PM ACCEPTED ANSWER This shouldn’t hurt the controller, but it can cause a short voltage peak if there was still current flowing into the batteries. The unit is not designed to have the battery disconnected under load/charge.
- What happens if you drop a battery?
- Dropping a battery might damage it, depending on how the battery falls and what surface it hits. For example, if the battery falls on a hard surface like concrete, there’s a good chance that it will be damaged. Even if the battery doesn’t appear to be damaged on the outside, it could have internal damage that affects its performance or lifespan.
- Can a BMS disconnect a battery?
- Please note that although a BMS can disconnect a battery, under normal circumstances this shouldn’t happen. The battery should be charged to a voltage where the BMS doesn’t disconnect, and also discharged not too far so the battery doesn’t disconnect on ‘low cell alarm’.
