Schumacher ProSeries 00-99-000686, ProSeries PSJ-3612, ProSeries PSJ-4424, ProSeries 94080024, ProSeries 94080025, ProSeries PSJ-2212, ProSeries 00-99-000686-0906 User Manual

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Instruction Manual

Jump Starter & DC Power Source

Models: PSJ-2212 One 22-Ah Battery 12V PSJ-3612 Two 18-Ah Batteries 12V PSJ-4424 Two 22-Ah Batteries 12/24V




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important safety instructions

Someone should be within range of your voice or close enough to come to your aid when you are working near a lead-acid battery.

Have plenty of fresh water and soap nearby in case battery acid contacts skin, clothing, or eyes. If acid enters the eye area, rinse with cold water for at least 10 minutes and get medical help immediately.

Do not smoke, or use matches or cigarette lighters, or allow any spark or flame near the battery or engine.

Never operate the power source unit if it has damaged lead wire or clamps. Have the lead wire replaced by a qualified technician.

Wear complete eye and clothing protection when working with leadacid batteries.

Do not permit internal battery in the jump starter to freeze. Never charge a frozen battery.

handling warning

WARNING: Handling the cord on this product or cords associated with this product, may expose you to lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.

Operating Instructions

Warning: Failure to follow instructions may cause damage or an explosion. Read entire instruction manual before use.

1.Turn ignition off before making cable connections.

2.Use in a well-ventilated area.

3.Keep clear of fan blades, belts, pulleys and other parts that may cause injury.

4.Make sure the rotary power switch on the front panel is in the O (OFF) position until clamps are connected to the vehicle battery. If plugged into an 110V AC wall outlet, disconnect.

5.To prevent sparking, NEVER allow clamps to touch together or to contact the same piece of metal.

6.Clamp the red clamp (+) to the positive terminal of the battery. (For a negative grounded system.)*

7.Clamp the black clamp (-) to an unpainted and unmoving part of the chassis or engine block. The 3-digit display will show the voltage of the battery.

8.If you have connected the clamps backwards, an audio alarm will sound. DO NOT turn your jump starter on. This could cause serious damage. Reverse the connections, and the audio alarm will stop.

9.If no audio alarm sounds, turn the rotary switch to the 12V position. (Or, for Model PSJ-4424, switch to 12V or 24V.) The clamps are now powered. Crank the engine. If the engine does not start within 5 – 8 seconds, stop cranking and wait at least 1 minute before attempting to start vehicle again. (This permits the battery to cool down.)

NOTE: When the voltage on the clips exceeds 15 volts, the audio alarm will beep four times. If the cables are connected to a 24-volt system when the switch is in the 12V position, the audio alarm will sound continuously. TURN OFF the jump starter immediately or internal battery damage will occur.

NOTE: If the switch is in the 12V or 24V position or the jump starter is connected to a battery for more than 5 minutes, four beeps will sound. This is a reminder to turn the jump starter off and/or disconnect from battery when it is not in use.

10.After the engine starts, turn the rotary switch to the O (OFF) position. Then disconnect the black clamp (-) and then the red clamp (+) in that order. Store the clamps in the compartments located on the sides of the case.

11.Recharge the jump starter as soon as possible after use.

*NOTE: In the rare case of jump-starting a vehicle that has a positive-grounded vehicle electrical system, connect the NEGATIVE black clamp (-) to the negative terminal (-) of the vehicle battery. Then connect the POSITIVE red clamp (+) to an unpainted and unmoving part of the vehicle chassis or engine block. If you are unsure of the nature of the vehicle’s electrical grounding system, check the owner’s manual of the vehicle. To disconnect clamps, reverse order.


The display can be used to indicate a battery’s voltage when connected to a battery or the percentage of charge in the jump starter’s internal battery.

With the switch in the OFF position, connect the clamps to the vehicle’s battery and its voltage is displayed. Turn the jump starter’s rotary switch to 12V, (or, for Model PSJ-4424, 12V or 24V) and the combination of both internal and external batteries are shown.

To read the internal battery’s charge status: Press the display button to read the percentage of charge left in the internal battery. A fully charged battery will read 100%.

CHARGING of internal battery with built-in 3-amp, automatic charger.

After removing the jump starter from the carton, charge it for a minimum of 8 hours before using.

1.Make sure the rotary power switch on the front panel is in the O (OFF) position.

2.Plug extension cord into charger plug on the left side of the jump starter. (Extension cord not included; must be purchased separately.)

3.Plug the extension cord into 110V AC electrical wall outlet.

4.Charging of the internal battery could take up to 48 hours due to age and condition of the battery. At full charge, the charger will automatically drop into a float mode and maintain the battery at full charge without damaging the battery. The jump starter can be left plugged into the 110V wall outlet indefinitely to maintain full power.

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