Question:
I have a duralast 700 Peak amp jump starter. Im trying to charge my car battery but it only shows FL. The light in the car comes on but soon as I crank the car it goes off, back to dead. How can I get it to show a percentage thats left in the battery and get it to charge?
Dec 02, 2014 Peak 750 charger fix - Duration: 8:06. Cameron Gabe Burroughs 17,882 views. MODERN JUMP START PACKS - 3.
asked by: Martia
Expert Reply:
FL on the display of the Peak Performance Jump Starter # PKC0AZ indicates that the internal battery of the charger is full. When you connect it to a vehicle battery and put it in the ON position it should read the percentage battery life of the vehicle battery. If your battery won't register at all and the battery immediately goes dead when you crank it that would indicate typically that the battery of the vehicle is totally dead unfortunately.
Video/Article/FAQ this Question was Asked From
mine is brand new. manual says CHARGE it 24 hrs before using. Indicator says FL so it probably wont charge due to intelligent system. so I hooked up a radio to the 12 volt receptacle and the FL turned into 84, so i let it run and see if anything would change. after an hour, it still ready 84 and if i turn off the charger, it reads FL64251
The unit provides a DC output supply.Do you wish to charge the unit battery using DC? If so, there is this warning given in the guide'It is possible to overcharge the battery when re-charging using the DC outlet. Over charging the battery can cause permanent damage and decrease battery performance.
Only charge using DC supply if a 120V AC outlet is not available. Charging the battery this way (via AC connection) also safeguards the battery as there is built in protection from overcharging and damaging the battery, which is not provided when charging the unit battery via the DC connection.by. Hi,OK I get it now. Your unit (which is not the one in the link in my answer I suppose) doesn't have an inbuilt adapter. In that case to charge a battery you need to do it a what is known as 'charge at the 10 hour rate'. This rate is the standard charge rate for batteries. It prevents damage caused by overheating etc, which may occur at higher current values.
To get the charge current value, you divide the battery capacity, in your case 10AH by 10 giving a charging current of 1A.However charging voltage for a battery should be higher than the battery voltage so as to prevent the battery wanting to discharge back into the adapter.e,g, car 12V batteries charge at 13.8V. So ideally to charge your battery you need a DC14V 1A charger. 15V will do but keep a check that the battery doesn't overheat.by. Hi @ Dennis Green,I'd say not.You'd most probably damage the charging circuits and possibly the battery of the jump starterMost car battery chargers initially put out 4A when charging a battery, which reduces as the battery charges. They can do this as a car battery is usually a lead acid type (not as critical when charging as other types of rechargeable batteries) and there is no battery management circuits in play when you charge them directly from a car battery charger, i.e.
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Battery disconnected from car and charger connected directly across battery terminalsLooking at the specs for the charging adapter provided above, it only needs 0.5A to 0.7A to charge the jump starter. Obviously it takes longer to charge the battery with this amount of current, but most probably it is suited to the type of battery (and battery management system) in the jump starter.by. Is the center tap negative or positive on the charger for the PEAK 700?Their manual lacks detail for the charging apparatus. It could be 24 volts ac, it could be 12 volts dc center tap negative, it could be 15 volts center tap positive It could be anything!I expect to see a polarity, voltage, and current rating however we see none. Also we do not know what the circuitry is inside this. Can’t make assumptions there. Most likely they have a buffer to control impedance and some circuitry for usb etc etc.
You don’t know the design or whats going on internally to the device. Can you specify with 100% certainty? No, you can’t. Not without details.To determine a compatible charging unit, you will need the following information:1) specified center tap polarity ( positive or negative).2) voltage ( ie 12 volts 24 volts etc etc)3) specified current ( i.e. 400 mA)5) the size of the plug (i.e 2.1 mm)A part number would be great!Just guessing on the polarity is a roll of the dice. Don’t gamble. Get the facts!
It may have preventive circuitry to avoid damaging the unit if you use the wrong polarity but you don’t know. Until you find the mfg specs it’s risky to just plug it in. You might wreck it.
Is that an acceptable risk? No it isn’t, not for me.I have an email into the distributor and will update based on their feedback/findings.