A battery tender, is an external battery cell that helps keep a constant charge on a battery that is not in use and prevents it from self discharging. It is compatible with different vehicles including airplanes, ATVs, motorcycles, scooters, watercraft, and lawnmowers. Tenders are meant to keep a battery's SOC, and a charger is meant to, well, do just that. These tenders not only provide continuous voltage to the battery terminals but also make use of spark free technology for security. Battery 101: The Difference Between a Trickle Charger and a Regular Battery Charger A lot of factors that come into play when trying to decide the right battery. Use a compatible battery charger. It would take a 10 amp charger about 11 hours to recharge a dead battery to near 100% full charge. Your tender might not start charging on a totally dead battery. Step 2 Connect the negative, or black, cable from the battery charger to the negative battery terminal by squeezing the alligator clip at the end of the cable so that the jaws open. A good quality battery trickle charger (or maintainer) can be used every day. “If the battery is out of the bike, they suggest charging the battery every month. The Battery Tender Plus 12V 1.25A Battery Charger is smart charging made easy. The newer smart battery chargers will not turn on if the voltage of the battery is too low. I show how to test with an ESR Meter on bad capacitors in circuit with the MESR V2. Most tenders are in the 0.75a to 1.25a range, and chargers are typically 4A>. Originally I tried to charge my Yellowtop Optima Car Battery, but I ended up charging some Walmart car batteries as well. Check your car battery for any settings for the charging rate and apply the charging rate for your needs. I just hooked up the tender and touched the battery terminals with booster cables hooked to a good battery. If the battery won't even take a charge, it's almost definitely dead and needs to be replaced. Read honest and unbiased product reviews from our users. (If you don’t have and use one of these, it’s probably a big part of why your battery is dead. Also, be sure to remove all jewelry and metal tools from the work area. 2. It's Encapsulated and Protected from Moisture by an Electrical Insulation at Amazon.com. This car battery charger features a quick connect harness and includes ring terminals and alligator clips that are easy to hook up to your battery and get your car going again. This is another low-rate trickle charger, but with a few extra features to make your battery maintenance experience easier. The output current of the charger 4. Overcharging the battery is also a bad idea, even a small spark can cause an explosion. It is the battery tender junior. The capacity of the battery 2. The Tender is designed to be constantly connected. Top off the battery each fall and each spring, and use battery tender to keep the battery healthy when the ATV is sitting for long periods without being used. Motorists can also avoid a dead battery with these preventative measures: Install a Battery Tender - This device has two claws that attach to your battery's terminals like jumper cables. I've had 2 Battery Tenders go bad over the years and kill batteries. At its most basic, a car battery is constructed of alternating plates of dissimilar metals, usually lead and lead oxide (Pb and PbO 2 ), in an electrolyte bath, usually sulfuric acid (H 2 SO 4 ) in water. A battery tender is not to be confused with a battery charger, but one wouldn't call this device a tender. Car battery death, for the purposes of this article, refers to the battery’s inability to hold a charge, usually caused by sulfation. 2-4 ampere is typical for a maintenance charging, and it will take around 24 hours to charge a dead battery at this load fully. For batteries that cannot take a charge, it is best to use an old fashioned battery charger, not one of the newer high tech Smart Battery Chargers. Your battery is most likely scrap anyway, if it's the maintennace free type, they don't rebound well at all from being completely discharged. Connect the battery charger. Only when that surface charge is recognized will it begin to pump in a current to bring the battery to a full charge. A compatible charger is needed when you’re recharging the reconditioned battery. 2. Charging your battery on a low amperage on a smart charge is fine if you are looking to maintain your battery or keep it on a low charge for a period of time. Battery tenders are your ultimate saviors specially in winters when headlights, wipers, and heater are running most of the time. If you're intent on recharging your battery, you're going to need a battery charger. The time needed to charge any battery depends on: 1. With a seriously depleted battery, the best thing to do either before or immediately after a jump-start is to connect it to a dedicated battery charger. Usually, a standard car battery charger is giving out 4-15 amperes. 3. To calculate your total charge time for a battery, a good rule of thumb is to take the amp hour rating of the battery and divide by the charger rating (amps) and then add about 10% for the extra time to totally top off the battery. This does not mean that the battery is completely dead, just that the charger … Hi, Ann. What are the charging stages? 5. Check the instructions about jump starting (magic start) the tender with a 12 volt source. Modern float chargers get a battery charged and then switch on and off automatically to keep the battery’s charge rate at the optimal charge level. Immediately after a full charge, the battery should read over 13V. The 12-volt/0.75-Amp battery charger is compact and lightweight enough to save space in the car or in the garage. When you hook up the leads to the battery, the smart charger attempts to sense an initial surface charge so that it recognizes that it is indeed connected to a battery. ATV batteries should be charged any time the battery voltage drops below 12.4 – 12.6 volts. When properly connected, plug in the charger. These charging devices are designed to feed electricity into a dead battery at the rate necessary to safely and deeply charge it without causing any damage. How to Use a Battery Tender to Properly Charge the Car Battery? Use a battery tender. Just sayin’.) The degree of discharge of the battery 3. There's not much difference between a battery that's almost dead and dead in wattage required for full charge, although the almost dead might read 7 volts, which would turn on the Tender. Make sure the battery terminals are properly connected to the charger. Find helpful customer reviews and review ratings for Battery Tender 800 is a SuperSmart Battery Charger that will Constantly Monitor, Charge, and Maintain your Battery. Deltran's Battery Tender Plus ranks as our top overall car battery charger, but the company's Battery Tender Junior is the perfect choice if you're simply concerned about long-term battery storage. A dead or dying battery can easily leave you stranded at the worst possible time, ... use a trickle charger or battery tender with an automatic shut-off feature to keep it in good condition. This type of battery charger is one that I use and highly recommend. I hooked it up and it keeps flashing the red light which means the battery is not charging. A long, slow charge using a charger that is specific to the type of battery is optimal because it can compensate for temperature, the rate of charge and allow for the conditioning of the battery. If the battery is below a certain level of charge, it will activate bulk charge mode, delivering its full charge at a constant rate. Easy REPAIR of two Battery Tender Jr trickle chargers. Battery Tender 021-0123 – Keeps Batteries in Best Shape. BATTERY TENDER® Plus 1.25 Amp Battery Charger. It monitors the battery and turns on when needed 2005 SRT 10 Ram Quad Cab Red 1500 original miles (sold 10/12/17) (totaled by new owner 11/03/17 ) the battery is a original yamaha battery which was purchased 7 monthes ago and barely used. It has a sensor that indicates when your charge is too low and needs to start charging, or senses your battery is charged and will stop supplying a charge. 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