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Liters Not Amps product guide

Clore Automotive Jump-N-Carry JNC770R Premium 12V Jump Starter

Long-reach shop starting with USB and 12-volt accessory power

Clore rates the JNC770R at 1700 peak amps and 425 cranking amps, with 68-inch number 2 AWG leads, PowerJaw clamps rated to 1000 amps, a 3-amp built-in charger and a master ON/OFF switch. A 7-segment display replaces the needle gauge and reports charge state and faults as three-letter codes.

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Published specifications

  • Clore: 1700 peak amps and 425 cranking amps, 12-volt sealed lead-acid
  • Clore: 68-inch number 2 AWG leads; PowerJaw clamps rated to 1000 amps
  • Clore: built-in 3-amp automatic charger; 7-segment display; 23 pounds
  • Clore: dual USB outlets at 2.1 A and 1.1 A, plus a 12-volt DC outlet
  • Manual: 12-volt outlet capped at 12 amps by an auto-reset breaker
  • Clore: one year limited warranty plus an included repair service coupon

Fit and limits

Strengths

  • Manual says it may stay connected to AC power indefinitely on its automatic charger
  • Display reports charge state and fault codes instead of a needle gauge
  • Master ON/OFF switch, which the manual says to leave off in storage

Caveats

  • The warranty PDF on the listing carries headings and a disclaimer but no terms
  • Manual's temperature lines conflict: output falls below 70F, yet 68F is called ideal
  • Manual describes a household extension cord while the listing supplies its own cord

What Clore publishes, and what the listing says ships

Clore's JNC770R page gives 1700 peak amps and 425 cranking amps from a Clore PROFORMER lead-acid battery, 68-inch number 2 AWG welding cable leads, PowerJaw clamps it rates to 1000 amps, a built-in 3-amp automatic charger, a master ON/OFF switch, dual USB outlets at 2.1 amps and 1.1 amps, and a 12-volt DC outlet for accessories.

Its specification table adds a 7-segment indicator display, a weight of 23 pounds and UPC 010271025169. The listing carries the same UPC and the same 23 pounds, and adds a 22 amp-hour battery capacity, a lead-acid AGM cell composition and a footprint of 9 inches deep by 18 wide by 22 high. Clore publishes no amp-hour figure and no dimensions.

The listing's included-components field names three items: the JNC770R itself, a charging cable, and a 12-volt male-to-male connector. A bullet identifies the charging cord as Clore part JNC350. Clore's page publishes no box list, so the listing is the only source here for what arrives in the carton.

The display is the interface, and it talks in three-letter codes

This unit reports state of charge as text rather than a needle. Holding the V button shows the reading: below 12.4 volts the display flashes the voltage and then shows CHG continuously, between 12.4 and 12.8 volts it shows the voltage and flashes CHG three times, and above 12.8 volts it alternates the voltage with FUL.

The manual also names error codes you may meet. Er1 is reverse polarity and Er2 is over-voltage, which it defines as a connection to a battery above 16 volts DC. The newer of the two manuals on the listing adds Er3, shown when you connect the charger and the internal battery is either damaged or too discharged to accept a charge.

At the pages read, the two manuals are otherwise the same. The older copy describes a test switch and battery status display in its features list and carries no Er3 entry; the newer copy drops that feature line and adds Er3. Both are attached to the same listing, so read whichever one arrives in your box and check the printed revision.

One charging method, and a cord worth checking

The manual gives a single recharging route: a household extension cord into the two-blade charger plug on the back of the unit, charged until the display reads FUL. It states plainly that the unit can remain connected to AC power indefinitely without adverse consequences, because the charging system is fully automatic and draws only what the onboard battery needs.

There is a wrinkle worth noticing. The manual's recharging instructions describe a household extension cord, while the listing says a charging cord is included and names it as part JNC350. The manual does not list a cord as supplied, and neither document mentions the other, so confirm with the seller which cord you actually receive.

Two other charging rules are explicit. A regular 10-amp battery charger must not be used, and leaving the unit clamped to a running vehicle to recharge is not recommended, because alternator output of 25 to 125 amps greatly exceeds the recommended rate and charging that way may void the product warranty. The cover page asks you to charge on opening the box, after every use, before extended storage and every three months when idle.

USB, the 12-volt outlet and the work light share one button

The two USB outlets are rated at 2.1 amps and 1.1 amps maximum. They are not live by default: the manual says a quick press of the Light Button wakes them, confirmed by a green status light between the two ports. The same Light Button also runs the high-intensity LED work light through steady and flashing modes, with the exact press pattern set out in the manual.

The 12-volt DC outlet has automatic overload protection, and the manual puts a number on it: any accessory up to 12 amps, with an automatic reset circuit breaker above that. It lists fans, radios, phones, navigation equipment, trolling motors, coolers and small refrigerators as examples, and names 400 watts as the maximum recommended size if you feed an inverter from it.

The manual also describes using that outlet with the male-to-male cord to keep vehicle electronics alive during a battery swap, with the caveat that the vehicle's own socket has to stay live when the ignition is off. It notes some vehicles deactivate their 12-volt outlets when switched off.

Temperature and storage, plus a line that reads oddly

For jump-starting duty the manual says not to store the unit below 50 degrees Fahrenheit. It also says the unit may be used in rain, snow, hot or cold weather but must not be submerged, and neither Clore's page nor the manual pages read here gives any IP rating for it.

One sentence in the performance section deserves flagging rather than smoothing over. The manual states that temperatures below 70 degrees Fahrenheit decrease amperage output, then names room temperature, which it gives as 68 degrees, as the ideal storage environment. Those two lines sit next to each other in the same document. We are not going to guess which is intended; ask Clore if the distinction matters to you.

Storage guidance is straightforward. The sealed non-spillable battery means the unit can be stored in any position and virtually anywhere, provided the clamps are kept apart, the cables are re-wrapped and re-holstered, and the master switch is left in the OFF position. Clore recommends keeping the original box.

Warranty, the repair coupon, and a PDF with nothing in it

Clore's page lists a one-year limited warranty and, separately, a Repair Service Coupon included with the unit, which it says lets the end user get a fixed-fee repair after the one-year warranty period has expired. That coupon is a JNC770R page item; no terms, duration or conditions for it are published on the page we read.

The listing is thinner on this point. Its Manufacturer Warranty Description field says only Manufacturer Warranty, with no term. The PDF the listing's Warranty & Support panel links to is a single page carrying the headings CHARGER CARE & MAINTENANCE, LIMITED WARRANTY and FOR WARRANTY OR SERVICE followed by a generic note that warranties may not apply in all cases, and no actual warranty text underneath.

So the one-year figure here comes from Clore's own product page, not from a warranty document we could read. The manual's introduction adds one practical condition: save the purchase receipt, because it is required for warranty service, and it points warranty and missing-item questions to Clore Automotive technical service. The manual also confirms the sealed lead-acid battery can be replaced through that same service line.

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Primary sources

  1. Clore Automotive product page and specification table for the JNC770R
  2. Jump-N-Carry 12 Volt Jump Starter & Power Supply operator's manual (listing-supplied copy)
  3. Second operator's manual PDF attached to the same listing
  4. Warranty PDF linked from the listing's Warranty & Support panel

Primary sources checked .

Compare with

Side-by-side pages, this model next to: Clore Automotive Jump-N-Carry JNC660 1700 Peak Amp 12V Jump Starter, Clore Automotive Jump-N-Carry JNC325 12V Lithium Jump Starter.

Keep comparing

Use the Liters Not Amps product index to compare other models, or read the full buying guide for category-level advice.