How do i charge my 600 amp jump starter. battery says low. Been plugged in 2 days and not charging

The flashing "FL" indicates that the internal battery of the Peak Performance Jump Starter # PKC0AZ is fully charged and is ready to be used.

Refer to the instructions that came with charger. If you threw them away you have a problem You can go on line and download instructions.
Low Charge Alert (LCA)
On the front of the unit there is a Low Charge Alert port. There is a red plug in this port. With the plug
removed, when the battery level drops to LO, an alarm will sound to remind the user to recharge the
Jump-Starter.
The alarm can be turned off one of three ways:
•
Placing the pin back into the Low Charge Alert port
•
Recharging the battery immediately to bring it to the capacity of 10% or more
•
Pressing the battery indicator display button. If the alarm is turned off by pressing the battery
display button, the alarm will sound automatically again in approximately 1 hour.
The alarm will only be turned off permanently if the battery is in a fully charged state, or the pin is
inserted in the Low Charge Alert port. There is a storage port on the back of the Jump-Starter for the
LCA plug. When the plug is removed from the LCA port, it should be installed in the storage port on the
back of the Jump-Starter.
Charging Jump-Starter Battery
All rechargeable batteries gradually discharge when left idle, and you need to recharge them
periodically to maintain maximum battery capacity. The AC charger plug within the Jump-Starter is
designed to charge using a 110/120-volt outlet.
•
Fully charge unit to the recommended maximum and initial charge time of 24 hours. Thereafter, an
AC typical charge time is 8 to 12 hours.
•
Recharge the unit fully after each use. This will prolong the life of the battery because frequent
discharges between recharges will reduce battery life.
•
Make sure all functions of the Jump-Starter are turned off during recharging

Maybe the rechargeable battery needs replacing. Go to a battery store and buy a replacement.

Google for an owner's manual. I can't find anything on this jump starter, but first they need to be charged, usually by plugging into a wall socket for 12-24 hours. Then plug into the cigarette lighter for 10 min or so to give the car battery a boost charge.

Hey Steve, if you need a jump to start it then every thing is working except battery holding power try putting battery on a SLOW charge for a day then try again when its running check output of altinator with a fully charged battery it should be 12.5-13.5 volts and rise when you rev motor up ,when you jump it im thinking the battery is very low and the altinator is trying to recharge battery and it cant do that in just a few minutes running time or take it on along ride and watch amp gauge .good luck Steve.
Woody

Why are these forum responses so often worthless? I have one of these units and it has never worked correctly. It says the battery is fully charged but when you try to jump start it; it beeps then the battery indicator says it's empty. You plug it in and if flashes between 3 and 4/4 battery bars. The USB does the same thing. Originally, it worked but the battery was always less than what a small portable battery offers in capacity. The air compressor and light used to work too.

If the battery is fully charged there is but one thing tjst gives you those symtoms. You simply have a bad connection at the negativbattery cable. It won't hurt to ck the positive cable also. This os a common thing when a battery is connected and idle..Always disconnect the bat neg if the the vwhicle won't be used for more than two days. If possible, don't charge your dead battery with the alternator of the vehicle. It could very possibly cause charging problems. The clickinf is from insufficient voltage and jump stating with te dead battery still in place doesnt work because the goog and bad batteries are try to balance again, causing low voltage/amps to the starter. Good Luck. Sorry about the lesson, habit.