Quick Summary
The Clarke JSM1200 is a 12 V jump starter with a 600 A starting current and 1200 A peak current. It combines jump-starting support with USB charging outputs, a digital battery display and a built-in LED light.
It is stated as suitable for petrol engines up to 5.5 litres and diesel engines up to 3 litres. The included smart clamp leads and carry case make the main parts of the kit clear before you choose an offer.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Product type | 12 V jump starter for vehicle use. |
| Starting current | 600 A starting current, with 1200 A peak current for the exact unit. |
| Engine guidance | Suitable for petrol engines up to 5.5 litres and diesel engines up to 3 litres. |
| Battery | 12,000 mAh lithium polymer power pack. |
| USB outputs | Two 5 V USB outputs rated at 3.0 A and 2.1 A for charging compatible devices. |
| Display | Digital battery-level display for checking charge status. |
| Lighting | Built-in LED light with illumination, strobe and SOS modes. |
| Included items | Smart clamp leads and a carry case are included. |
What to Compare Before Buying
- Vehicle size and engine type: The stated starting guidance is up to 5.5 litre petrol and 3 litre diesel. Check that this matches the vehicle you want to support.
- Output needs: The unit provides 600 A starting current and 1200 A peak current. Compare that with the starting requirement of the vehicle.
- Charging options: Two USB outputs are included at 5 V, 3.0 A and 2.1 A. Check whether those outputs suit the devices you plan to charge.
- Battery capacity: The 12,000 mAh lithium polymer pack is an important check if you want a jump starter with onboard stored power.
- Included kit: Confirm the smart clamp leads and carry case are part of the exact offer you choose.
What Is Included
This jump starter is supplied with smart clamp leads and a carry case. It also includes the built-in LED light and dual USB outputs as part of the unit itself.
Before You Decide
Check the vehicle engine size, the stated 12 V starting output and the included accessories before choosing this model. If you need a jump starter for a larger engine or a different power setup, compare the figures carefully before buying.
