Cobra JumPack XL CPP12000 Jump Starter: Specifications and Safety Notes

How we research
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At a glance

  • What it is: A heavy duty portable jump starter and USB power bank from Cobra Electronics EMEA.
  • Key specifications: 300A starting and 500A peak current; 41.1 Wh (11,100 mAh) lithium-cobalt battery; 3A USB port; LED flashlight; 1-year warranty (Cobra datasheet).
  • Suits: Drivers who want a jump starter that can also charge phones, with a mains and a car charger in the box.
  • Skip if: You want a current product; the datasheet we opened is from 2017.

We haven’t tested this product ourselves. This page summarises Cobra’s data sheet (version 1.1, dated 16 May 2017), checked 19 October 2026. We could not open a current retailer page.

Specifications

Specification Detail Source
Product Cobra JumPack XL CPP12000 heavy duty jump starter [1]
Current 300A starting current; 500A peak current [1]
Battery 41.1 Wh (11,100 mAh) UL-registered lithium-cobalt [1]
Vehicles Cobra says it can jump start standard engines and larger petrol and diesel vehicles, including light commercial trucks, motorhomes, vans and minibuses, multiple times per charge [1]
Extras 3A USB port; built-in LED flashlight; 3-colour jump start status LED [1]
In the box Storage case; heavy duty jumper cables; 240V AC adapter (UK/EU) and 13. The larger vehicles claim is Cobra’s; the datasheet gives no engine size in litres. Our jump starter size guide explains how to match a unit to an engine.

What owners report

We have not reviewed owner feedback for this product.

Known issues and safety

Recall check: we searched GOV.UK product safety alerts, reports and recalls (Office for Product Safety and Standards) for “cobra” on 19 October 2026 and found no results [2]. Check the list again for the exact model before you buy.

We did not read the manual. Follow the instructions supplied, and keep a lithium unit charged and out of hot cars.

Questions people ask

What engine size is it rated for?

The datasheet describes standard and larger petrol and diesel vehicles but gives no litre figure [1].

Can it charge a phone?

Yes, through the 3A USB port [1].

Is it still sold?

We could not confirm that. The datasheet is from 2017.

Alternatives

Our verdict

Based on the evidence, this was a capable jump starter and power bank in 2017, with 300A starting current. Check availability and support before buying one second-hand. This is a research summary, not a test result.

Sources

  1. Cobra JumPack CPP12000 XL Heavy Duty Jump Starter data sheet, Cobra Electronics EMEA (hosted by Farnell). Version 1.1, 16 May 2017, farnell.com. Checked 19 October 2026.
  2. GOV.UK search of product safety alerts, reports and recalls, Office for Product Safety and Standards, gov.uk. Searched 19 October 2026.