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How to Charge a Car Battery Using a Battery Charger

If you find yourself with a dead battery in your car and have access to a battery charger you are only some time away from being on the road again. Whether you are using a small car charger known as a trickle charger or a larger unit on wheels, you can charge your battery effectively. There are safety concerns though. Be sure to check the warnings
1、Locate the battery or remote charging point by consulting the owner’s manual. You can also open the hood to find the battery. The laptop battery may be under a seat, in which case a charging point may be provided under the hood.
2、Remove any plastic covers that may be protecting the positive and negative posts of the battery. Just push the covers to the side as they are usually pliable. Note the location of positive and negative terminals signified by a plus and a minus sign respectively.
3、Locate the laptop car charger so that its cables will reach the battery. Make sure your charger will reach an electrical outlet. Add an extension cord if needed.
4、Place the clamps of the charger on the battery making sure that the red handled clamp goes to the positive battery post and the black handled clamp goes to the negative laptop batteries post. If you are not sure, trace the cable attached to the clamp back to the charger and look for a positive or negative designation. If you are still not sure, stop and seek professional advice.
5、Plug the charger in, making sure that the selection switch is set to off.
6、Select the appropriate voltage and or rate (almost all cars have a 12 volt system). If time permits choose the slower rate and plan on charging the battery for two hours. This selection will turn the charger on. If the charger has a timer, set it.
7、After charging the battery, unplug the charger, disconnect the charger’s cables and start the car.

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1 Answer

Why roomba clean for 2 minutes then returns to dock?


I suspect the battery is about dead. It keeps coming back for more power.


Run it away from it's charger, force it to run until it dies. Put it onto it's charger and let it charge a long time (Solid green light). Then run it again till it dies and repeat. This will perhaps force the battery to develop a longer memory

May 09, 2014 | iRobot Roomba 4210 Bagless Robotic Vacuum

1 Answer

My fone dead put charger in does nothing dead dead dead


Nokia phones are notorious for slow response time when recharging from a completely dead battery.

Remove battery.
Make sure there is good contact between all of the contact points.
Replace battery.
plug in charger.
wait for at least 5 min.
If recharge symbol does not appear in window, then one of these things has occurred:
1. Phone has internal damage or water damage. no way to fix without nokia service.
2. Battery is dead. Try a new battery
3. Charger is bad. Try a new/different car charger or home charger.
These chargers are very inexpensive on Craigs List, try to solve it before throwing away the phone. Good luck,
A former Nokia employee.

Feb 16, 2011 | Nokia Cell Phones

2 Answers

dead unit


My Quest2 has a short in it that drains the battery even when it is turned off. But the battery lasts normal 15 to 20 hours when fully charged and unit is on. Whenever the battery is completely dead, I have to place it on the charger for a hour or two before the unit will even start even though it is plugged plugged in. The battery can be replaced by the staff at batteries plus for under $60.00 

Oct 12, 2008 | Garmin Quest GPS Receiver

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