My car's battery was dues to be changed. Every time I started the car, I could hear that one day it will not start.
Monday morning, I have an important meeting at 9:00. I am ready to leave my house, but I can't start the car.
Battery does not have enough juice. In the area I live, there are no cars around. I could ring my friend to give me a lift or a jump-start, but it will take at least 40 minutes.
There is no way I can push-start my car.
Time is running out. I go inside and pull out the battery from my drill.
It's 12v battery, just like my car's.
I tape 2 screws to the batteries + - terminals.
I connect the both batteries together using jump leads.
I wait 10 minutes before trying to start my car. After 10 minutes, I manage to start my car.
Let's go to the meeting and on the way back, pick up a new battery.
I got lucky this time.
A made up story, but it could be real :)
This little trick should work the best if:
- Your drills battery is charged, big capacity and the same voltage as car's battery or a little bit higher.
I used 12v drill battery to hook it with my 12v car's battery. I believe it should be fine to connect 14v, 16v battery, but I am not 100% sure at what point do you cross the line, putting your car's electronics at danger. That's why I recommend using the same voltage battery. If you know the answer, please let me know in comments.
- Your car's battery is not completely dead.
- If you own a small car with a small battery.
It's not the smartest thing to do, so only try it out if there is no other way. There is always a small chance of destroying your drills battery or messing up your cars electronics. 99% of times nothing bad will happen, but let's put it that way. I would not jump-start my "Porche" this way.
- Pull out the battery from your drill.
- Tape 2 screws to battery terminals.
- Connect both batteries together using a jump lead.
Positive to positive, Negative to Negative.
- Let batteries to sit for around 10 minutes or more.
- After 10 minutes, try to start your car.
You have 2 options.
To disconnect the battery and try to start the car or leave the battery connected and start the car.
Leaving drills battery connected should give better results, but could damage it.
I only waited 8 minutes before trying to start my car. I expected for the engine to struggle, but it did not.
Car started - Ouu Yeah!
Here is another reason to keep your drill's battery charged!