WOLFBOX MegaVolt24
#1 in Heavy dutyFull review
A lot of rated capacity for the money: it covers big gas and diesel trucks up to 10 liters and comes with a fast USB-C charger. A strong value pick for pickups and work vehicles.
Amazon $119.99$119.99
The WOLFBOX MegaVolt24 is the better jump starter overall, rated 4.4 to 4.3. The WOLFBOX MegaVolt24 leads on capacity and warranty. The GOOLOO GT4000S costs $20.03 less ($99.96 vs $119.99).
GOOLOO GT4000S
#3 in Heavy dutyFull review
A compact pack that covers big V8s and most diesel pickups and recharges in about an hour over USB-C. A strong pick for truck owners who also want a laptop power bank.
Amazon $99.96$99.96
Prices were last checked October 30, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the WOLFBOX MegaVolt24 for capacity (88.8 Wh battery vs 74 Wh battery) and warranty (2-year warranty vs 1.5-year warranty).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every heavy duty jump starter; a clear win is highlighted. How we rank explains each one.
| Factor weight | WOLFBOX MegaVolt24 | GOOLOO GT4000S |
|---|---|---|
| Overall rating | 4.4/5 | 4.3/5 |
| Value 40% | 94 $119.99 for its size | 100 $99.96 for its size |
| Features 35% | 90 manual override, rated to -4 °F, USB-C charging, IP64 | 90 manual override, rated to -4 °F, USB-C charging, IP65 |
| Capacity 15% | 61 88.8 Wh battery | 42 74 Wh battery |
| Warranty 10% | 50 2-year warranty | 25 1.5-year warranty |
Specifications
| WOLFBOX MegaVolt24 | GOOLOO GT4000S | |
|---|---|---|
| Starting | ||
| Rated engines | 10 L gas, 10 L diesel | 12 L gas, 10 L diesel |
| Peak amps (maker) | 4,000 A | 4,000 A |
| Cranking amps | 1,000 A | 800 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | Yes |
| Lowest operating temperature | -4 °F | -4 °F |
| Battery and charging | ||
| Chemistry | Lithium-ion | Lithium-ion |
| Capacity | 88.8 Wh | 74 Wh |
| Capacity (mAh) | 24,000 mAh | 20,000 mAh |
| USB-C input | 65 W | 100 W |
| Recharge time | 1.5 hours | 1.2 hours |
| USB outputs | USB-C 65 W, USB-A QC3.0 18 W | USB-C 100 W, USB-A 18 W, 15 V DC 10 A |
| Build | ||
| Flashlight | Yes | Yes |
| Air compressor | No | No |
| Water resistance | IP64 | IP65 |
| Dimensions | 9.33 x 3.86 x 1.5 in | 9.05 x 3.93 x 2.12 in |
| Weight | 2.9 lb | - |
| Warranty | 2 years | 1.5 years |
| Released | 2024-02 | 2022-07 |