Does this unit prevent overcharging? Plan to use it on a car battery of a car that is not frequently used, not to recharge a dead battery.
204575
Yes, the charger enters what it calls a plulse mode that monitors the batteries voltage and keeps it at optimum charge. I have mine on my car all winter and with the indicator lights on the charger you can see what or where it is in the charge or maintain cycle.
204576
Yes, it does prevent over-charging. This is accomplished by the charger switching to a type of stand-by mode when the battery is fully charged. Its LED display shows the specific cycle in which the charger is operating. If the battery power drops to a level below full charge, the charger switches to charging mode to top-off the battery again. I am completely sold on this CTEK Charger! Also, it CAN re-charge a supposedly "Dead" battery, if the battery is still capable of accepting a charge. This is achieved through its "de-sulfation" (altho this is not the correct term) process.
204577
It is perfect for the occasional use vehicles, the charger can be left in maintenance mode (which it enters after detecting battery is full), to keep the battery in optimal condition so it's ready when you are. I have it plugged it to my 1972 Riviera which is used infrequently (especially not during winter months up here). I even modified one of the harnesses it comes with (the eyelet one), and it is now permanently connected to the battery and runs into the cabin under the passenger dash, and therefore I don't need to open the hood to connect the unit :)
204578
Yes, it does prevent over-charging. This is accomplished by the charger switching to a type of stand-by mode when the battery is fully charged. Its LED display shows the specific cycle in which the charger is operating. If the battery power drops to a level below full charge, the charger switches to charging mode to top-off the battery again. I am completely sold on this CTEK Charger! Also, it CAN re-charge a supposedly "Dead" battery, if the battery is still capable of accepting a charge. This is achieved through its "de-sulfation" (altho this is not the correct term) process. Yes, it does prevent over-charging. This is accomplished by the charger switching to a type of stand-by mode when the battery is fully charged. Its LED display shows the specific cycle in which the charger is operating. If the battery power drops to a level below full charge, the charger switches to charging mode to top-off the battery again. I am completely sold on this CTEK Charger! Also, it CAN re-charge a supposedly "Dead" battery, if the battery is still capable of accepting a charge. This is achieved through its "de-sulfation" (altho this is not the... » Read More Yes, it does prevent over-charging. This is accomplished by the charger switching to a type of stand-by mode when the battery is fully charged. Its LED display shows the specific cycle in which the charger is operating. If the battery power drops to a level below full charge, the charger switches to charging mode to top-off the battery again. I am completely sold on this CTEK Charger! Also, it CAN re-charge a supposedly "Dead" battery, if the battery is still capable of accepting a charge. This is achieved through its "de-sulfation" (altho this is not the correct term) process. « Show Less
941267
It depends on your car some cars have slow constant drains in them from security systems and lighting and advanced electronics and these would trick the Sansour into giving incorrect readings on your batteries voltage so most of the time the battery is suggested to be disconnected but if it's just for a little top off charge you can get away with it
717050
The phone's internal charger will allegedly keep it from overcharging and it generally is effective, however it is not smart to do as it tends to allow the battery to overheat and that will shorten the life of the battery eventually. Overnight on the charger every two or three days is best depending on your usage.
676628
I am guessing you are making reference to - "Great as long as you have a full charge on your battery to start. It was not very clear that it would not hold the battery state if it was not at a full charge." But then you read another and they are stating "After much contemplation and research,,, and calling the manufacturer I've been informed (buy the manufacturer) that this unit does NOT have any method of charge control. Beware! ... you can easily overcharge your battery(s) with this unit." I can tell you that I did put it on a low battery in my truck that had been parked and it charged it up just fine, not in one day but a week or so. As for over charging that too is a no brainer, without a control or regulator you run that chance. That is why I bought the Schumacher SPC-7A 12 Volt Solar Charge Controller and have no problems. This is the ticket if you have a vehicle parked for periods of time. If you had tons of electronics that are a draw on the battery it might not keep up.
29032
yes it will not overcharge, once it drops below full charge it brings it back up. I have three of these and always leave them in with no problems
827820
yes I don't see why it would not work, you should use a charge controller to prevent overcharging
2231309
In theory, you could leave it on and have it come on with your car's power, but it would drain the unit's battery after you turn off the car if you leave the switch turned on, and that's probably not a good idea long term. I turn mine on and off when I use it.
852539
To some extent, it does a more complete job of charging without overcharging. I found out that I wasn't charging my deep cycle battery enough with the car charger I was using - this critter worked on that battery for about 36 hours before saying it was charged, and the battery worked much better afterwards. At the very least it can eliminate battery problems caused by operator error. ;)If you're considering getting one of these, just get it! It saves a lot of time and reduces the number of things you have to worry about on the boat.
51629
It charges a weak battery. If the battery is, for example 50% charged and it only takes several minutes to bring it back to 100%, some cells of the battery are dead rendering it useless. Won't jump start a car, not it's purpose. There are chargers/ jump starters, but be prepared to spend more $. It will, however,serve as a maintainer should you plan to leave the car sitting several days. It's all in the instructions. Be safe, read the instructions. On rare occasions batteries get hot (to the touch) meaning they are going to explode. I always touch the battery after a half hour or so.
729802
This unit is not a "constant charging" design. That is what makes it a cut above the rest. It charges to full charge, and then only senses that battery's charge level. When charging is needed to bring the battery back up to full charge, it turns on again. I have had one on a stored car's battery for almost a year as I have never gotten the engine back together. Another sports car I have may sit for a week or more without it being started. It has a Battery Tender attached to its battery too when that car sits.
2023950
Yes, this past summer I used an old 12 volt car battery, but the system was turned on for about 10 hours at night-time only. For my situation, I simply charged the battery once a week. It worked fine, but a deep cycle battery would be preferred to avoid the need for frequent charging.
1244097
i am not a mechanic, nor electrical engineer, however, I doubt that the current required to charge this unit will do any harm to the battery. For a more qualified answer, you might check with your mechanic or dealer that sells auto batteries.
770535
The wattage of this unit is too low to charge a completely dead battery. It will only maintain a battery that is already charge,preventing your battery from getting drained even when parked for sometime.
2130034
Once the battery is fully charged, the controller will float the charge to the battery, this prevents overcharging. In other words, the controller ceases the charging once its full.
335515
I am using a car battery charger bought at (B&D;) Walmart and it works fine. The battery charger need be "smart" enough to sense when the battery is full and automatically shut off. Overcharging a sealed lead acid battery would not be good.
1106915
With the old style charger this type uses, I would think not. However, I have a power strip with a timer I use on all my chargers. I have it set for about an hours charge each day. This way everything is charged and ready to go with no over charging. Seems to work well for me and some batteries are several years old.
1862619
It does not harm the car battery but it harm the side contact spring of the charger. This is the most weakness part of the charger because the contact spring need to be welded to the electrical board & creep over time if you let it plugged. If the car key is turned on, it can charge when car is not running. Hope this answer your question.