The red connector must always go to the positive terminal. The black cable must always go to the negative terminal. Although the charger may detect reverse polarity connections, as described above, it could still damage the diodes in your rectifier. Step 2: Connect the charger terminals to the battery first, and double-check they are correct.
Step 4: Now check the charger current is flowing by checking the meter or indicators. Step 5: Once the battery is charged, switch off at the mains, then disconnect the terminals. This prevents sparks that may ignite any escaped hydrogen gasses. Chargers are only designed to provide a relatively low current, say ten amps max, for a standard car battery charger.
When you try to start your car, the battery could be supplying amps or more. Trying to draw amps from your charger will definitely blow a fuse and may even damage it. The only exception is if the battery is charged enough to supply the required current. Finding your car has a flat battery is a real pain. No need to get tools from the garage or get your hands dirty. Just connect the charger and wait. One small tip, though.
Find out why your battery went flat; otherwise, it will probably happen again. Your email address will not be published.
Save my name, email, and website in this browser for the next time I comment. I sure haven't had the old car battery issues I used to have since the Tender came to live with them, and it keeps me from having to monitor three battery chargers and go thru the spring and fall charging ritual.
It is money well spent for any old car owner. I've done that with a couple other batteries and gotten as much as 12 years out of one Delco. Now when that one died, it did it with style. I went in WalMart and when I came out, it was dead in the water. I've also gotten to where if I buy a new battery, unless it's an emergency installation I'll put it on a 2A charge at least overnight or until the automatic charger shuts off. I've found that a lot of on-the-shelf batteries are not fully charged, whether from storage or just bad sales preparation.
My 63 Riviera has a Interstate battery that is at least 10 years old and still going strong. Thanks to all for good info on charging batteries. You need to be a member in order to leave a comment. Sign up for a new account in our community. It's easy! Already have an account? Sign in here. OK to charge battery with cables attached?
Share More sharing options Followers 0. Recommended Posts. Posted January 26, Link to comment Share on other sites More sharing options Hope this helps Jan. Larry Schramm Posted January 26, Bluesmobile Posted January 27, Posted January 27, Guest Posted January 27, Reatta Man Posted January 27, ANY time you disconnect battery cables, just make sure you do it with plenty of ventilation.
Posted January 28, Guest Posted January 28, D Yaros Posted January 30, Posted January 30, Guest Posted January 30, Larry Schramm Posted January 30, Create an account or sign in to comment You need to be a member in order to leave a comment Create an account Sign up for a new account in our community.
Register a new account. Sign in Already have an account? Even though there is no risk of overcharging with the use of a high quality charger, the battery should not remain connected to the charger for more than 24 hours. A full charge is usually achieved by charging overnight. In maintenance mode, batteries can be kept at a high charge level even with long vehicle standstill times.
Even after a deep discharge, some chargers enable at least partial reconditioning of the battery. Important : Even though the connection and operation of the charger is not complicated, several points should be noted.
Charging a car battery differs in several aspects from the charging of a conventional battery. The operating instructions for the charger provide all the necessary information. Articles overview Share Share Share Print. Safe charging of car batteries. Battery Basics. June This article contains:. DIY maintenance and battery charging — what to note Important: Care is essential when handling lead-acid accumulators.
However, with proper and careful handling, all drivers can charge the battery themselves. First of all: Preparation before starting charging Charging of the battery in the vehicle is simpler and is preferable for safety reasons, although this is not always possible.
Car battery charging — step-by-step Disconnect the connecting cables Important : The cable which is connected to the negative terminal must be disconnected first. Check the state of the battery For lead-acid batteries which are not maintenance-free, we recommend that you visit a workshop.
Start charging Important : If the battery has to be removed from the car for charging, care must be taken to keep the battery upright when lifting and carrying it. Ending the charging process After the end of the charging process, the charger is first disconnected from the mains before the cables are disconnected from the battery. Special features of start-start-stop vehicles Charging of a battery with EFB or AGM technology is identical, however, care must be taken that the device is suitable for batteries with start-stop technology.
Interesting facts about chargers and charging times Many high quality chargers are compatible with various types of battery and switch off automatically when charging is complete. In this article Battery Charger. Most popular articles. Care is essential when charging a car battery. This is how to safely charge the battery. Testing of a conventional starter battery can be carried out more quickly than a check of an AGM battery.
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