Steelmate JS12
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Steelmate JS12
The Steelmate JS12 jump starter is designed for emergency starting of vehicles with a flat battery and also functions as a backup power source. With a capacity of 12,000mAh, the device can start petrol engines up to 5L and diesel engines up to 3L, even in cold weather. The integrated LCD display clearly shows the user the current battery status. Integrated ports and connectors can power mobile phones or tablets on the go. Measuring 167 × 84 × 39mm, the device doesn't take up much space in your vehicle's boot.
Key Features of the Steelmate JS12 Jump Starter
- The battery has a total capacity of 12,000mAh
- The device has two USB-A output ports for powering electronics
- The LCD display shows the current charge status and operating mode
- The integrated torch offers three light modes, including an emergency SOS signal
- Protection systems prevent damage to the device from short circuits or overcharging
- The output current is up to 400A when starting the engine
- Can start petrol engines up to 5L
Emergency Start Function
The device generates a starting current of 400A for 1.5 seconds, which is enough to start passenger cars with a 12V electrical system. This auxiliary power source operates in a temperature range of -20 to +60℃, making it effective in both winter and summer. The special starter clamps included in the package connect the battery directly to the auxiliary source without the risk of damaging sensitive onboard electronics. The device can be safely stored at temperatures from -20 to +60℃.
Multifunctional Jump Starter
In addition to jump-starting, the device functions as a portable power bank with two USB-A outputs. The first connector supplies a current of 2.5A, and the second supports fast charging with the Quick Charge 3.0 standard, with a voltage range of 3.6 to 12V. The integrated system automatically puts the power ports to sleep after twenty seconds of inactivity, thus saving stored energy. The source itself is charged via a USB-C input with Quick Charge 2.0 support.
Integrated Torch
The built-in LED light offers three different lighting modes for handling unexpected situations in the dark. Users have access to a classic steady light, a strobe flash, and the international emergency SOS signal. These light functions make it easier to work at night or call for help in case of a breakdown on an unlit road.
Safety Features
Protective circuits protect both the device and the connected vehicle from damage during an emergency start. The system includes safeguards against reverse current, short-circuiting of the clamps, overcharging of the cells, and high charging current. The current draw during inactivity drops below 40µA, preventing the integrated battery from self-discharging during long-term storage. The temperature range for safe cell charging is from 0 to 45℃.
Package contents:
Jump starter, USB cable, clamps
Capacity:
12,000mAh
Starting current:
400A
Max petrol engine size:
5L
Max diesel engine size:
3L
Dimensions:
167 × 84 × 39mm
USB 1 output current:
2.5A
USB charging current:
2 +/- 0.2A
Specifications
Output
Starting current
Max. volume
Functions
| Code: | AUPR127824 |
| Warranty: | 24 months |
| Links: | Producer's Website: |
| Manufacturer information |
TSS Group s.r.o., tř. Tomáše Bati 145, 763 02 Zlín-Louky, tel: +420 514 514 245, [email protected] 
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