S ZEVZO ET03 Car Jump Starter 4000A Jump Starter Battery Pack for Up to 8.0L Gas and 7.0L…
- Jump Starter
- 4000 amps
- 20 amps
- Universal Fit
A well equipped jump starter with a genuine 0V dead battery mode and useful extras, sized for everyday cars and trucks rather than heavy equipment.
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How it ranks among the 17 jump starters we track
4.6★ across 6,500 Amazon ratings, Bayesian-smoothed toward the category average.
6,500 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
6,000+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 17 jump starters we track - how the scorecard works · full jump starters data report. Confidence: high - strong rating volume and complete data.Updated 8 days ago. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
A 4000A peak jump starter rated for gas engines up to 8.0L and diesel up to 7.0L, built with a force start function aimed at batteries that have dropped to 0V.
Most jump starters struggle once a battery reads at or near 0V; the ET03's force start function in the clamps is specifically meant to push through that case, though S Zevzo notes the pack itself should be fully charged or above 14V for that to work. Beyond starting a car, the 74Wh cell doubles as a USB power bank, so the unit has a second life between jumps.
- 4000A peak current
- Up to 50 jump starts per charge
- 74Wh power bank with two USB ports
- 10 built in safety protections
Who it's for
Good for a driver who wants one compact unit to cover jump starting, phone charging, and an emergency flashlight in the trunk. Less suited to anyone needing to jump a heavy duty vehicle beyond a 7.0L diesel or 8.0L gas engine.
Strengths and trade-offs
Drawn from this product's published specifications.
- Force start function reaches 0V dead batteries
- Rated up to 8.0L gas and 7.0L diesel engines
- Doubles as a 74Wh USB power bank
- 500 lumen LED light with SOS mode
- Pack itself needs a full charge or above 14V to force start a dead battery
- Not rated for engines larger than 8.0L gas or 7.0L diesel
Performance notes
The 4000A peak rating is what lets the clamps push enough current for a cold or heavily discharged battery, and the force start function specifically targets a battery that's dropped all the way to 0V rather than just low. Ten separate protections, including overcharge, short circuit, and reverse polarity, are handled through the smart clamps, which signal errors by light and beep rather than requiring a display check.
Specifications
| Brand | S Zevzo |
|---|---|
| Model | ET03 |
| Dimensions & fit | |
| Item Weight | 1.4 pounds |
| Item Dimensions D x W x H | 1.5 × 3.4 × 7.5 inches |
| Capacity & performance | |
| Battery Capacity | 20 amps |
| Peak Output Current | 4000 A |
| Power & efficiency | |
| Amperage | 4000 amps |
| Battery Type | Lithium Ion |
| Voltage | 12 volts |
| Compatibility & installation | |
| Compatible with Vehicle Type | Lawn Mower, Motorcycle, Passenger Car, Tractor, Truck, Van |
| Included components | |
| Unit Count | 1 |
| Number of Packs | 1 |
| Included Components | Portable Carrying Case*1, S ZEVZO Car Jump Starter*1, Smart Jumper Clamps*1, USB Charging Cable*1, User Manual*1 |
| Warranty & support | |
| Manufacturer Warranty Description | 2 years |
| Other details | |
| Automotive Fit Type | Universal Fit |
| Number of Items | 1 |
| Item Type Name | jump starter |
How it compares
This product against the closest alternatives we track in jump starters.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| S ZEVZO ET03 Car Jump Starter 4000A Jump Starter Battery Pack for Up to 8.0L Gas and 7.0L…This product | 4.6 / 5 | 6,500 | 4.6 / 5 |
| Clore Automotive Jump-N-Carry JNC660 1700 Peak Amp 12 Volt Jump StarterClore Automotive | 4.6 / 5 | 19,800 | 4.8 / 5 |
| NOCO Boost GB50 1500A UltraSafe Jump StarterNoco | 4.6 / 5 | 16,800 | 4.7 / 5 |
| Hulkman Alpha85 Smart Portable Jump StarterHulkman | 4.7 / 5 | 13,400 | 4.5 / 5 |
| WOLFBOX 4000A Jump StarterWolfbox | 4.7 / 5 | 5,900 | 4.6 / 5 |
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Questions about the S Zevzo ET03
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Can the ET03 start a completely dead 0V battery?
Yes, via its force start clamp function, though S Zevzo recommends the jump starter itself be fully charged or above 14V first.
What size engines does the ET03 cover?
Up to 8.0L for gas engines and 7.0L for diesel engines.
Can it charge a phone as well as jump a car?
Yes, its 74Wh battery works as a power bank with two 5V/2A USB ports.