Autowit SuperCap 2 Batteryless Supercapacitor Jump Starter
By Lee · Researched & cited, not personally tested · Updated Jul 2026
- Typical price · Jul 2026
- $90-130
- Best for
- Buyers who hate maintaining a charge, live in extreme climates, or want an always-ready trunk unit.
- Key spec
- Supercapacitor, battery-free; up to 8.0L gas / 4.0L diesel; ~10yr lifespan
- Skip it if
- Anyone whose battery can go fully dead with no other power source — the SuperCap must draw a few minutes of charge from the weak battery, alternator, USB, or another source before it can jump, so it's not instant-from-empty, and it can't double as a phone power bank.
Typical price · as of Jul 2026
$90-130
Key spec
Supercapacitor, battery-free; up to 8.0L gas / 4.0L diesel; ~10yr lifespan
Disclosure · As an Amazon Associate, BlackBox Supplies earns from qualifying purchases — at no extra cost to you. See our full disclosure.
Opens the exact product on Amazon — confirm the model and current price there.
Batteryless supercapacitor jump starter that charges itself in minutes from your weak battery, alternator, USB or another source, then jumps the car; stores no lithium charge to age out.
The differentiator / premium-niche pick — holds no charge so it never dies in the glovebox, isn't damaged by heat/cold, and lasts ~10 years. Ideal leave-it-in-the-car unit that's always ready.
Best for Buyers who hate maintaining a charge, live in extreme climates, or want an always-ready trunk unit.
What earns it the pick
- Supercapacitor, battery-free
- up to 8.0L gas
- 4.0L diesel
- ~10yr lifespan
The honest catch
What we’d want you to know before you buy.
- It must draw from a power source for a few minutes before it can jump — not instant-from-empty like a charged lithium unit.
- It can't double as a phone power bank.
Must draw from a power source for a few minutes before it can jump, so it's not instant-from-empty like a charged lithium unit, and it can't double as a phone power bank.
How it compares
Autowit SuperCap 2 Batteryless Supercapacitor Jump Starter
- Price band
- $90-130
- Key spec
- Supercapacitor, battery-free; up to 8.0L gas / 4.0L diesel; ~10yr lifespan
- Verdict
- The differentiator / premium-niche pick — holds no charge so it never dies in the glovebox, isn't damaged by heat/cold, and lasts ~10 years. Ideal leave-it-in-the-car unit that's always ready.
NOCO Boost GB40 1000A UltraSafe Lithium Jump Starter
- Price band
- $80-100
- Key spec
- 1000A peak; up to 6.0L gas / 3.0L diesel; ~20 jumps per charge
- Verdict
- The default best-overall. Trusted for honest (not inflated) amp ratings, UltraSafe spark-proof + reverse-polarity protection, and a genuinely pocketable size — the unit everything else is compared against.
NOCO Boost HD GB70 2000A UltraSafe Lithium Jump Starter
- Price band
- $150-180
- Key spec
- 2000A peak; up to 8.0L gas / 6.0L diesel; ~40 jumps per charge
- Verdict
- The heavy-duty pick — doubles the GB40's output for trucks, vans, boats and diesels while keeping NOCO's safety pedigree. What serious truck/RV owners buy.
You're viewing Autowit SuperCap 2 Batteryless Supercapacitor Jump Starter | AlternativeSimilar price | AlternativePricier | |
|---|---|---|---|
| Price band | $90-130 | $80-100 | $150-180 |
| Key spec | Supercapacitor, battery-free; up to 8.0L gas / 4.0L diesel; ~10yr lifespan | 1000A peak; up to 6.0L gas / 3.0L diesel; ~20 jumps per charge | 2000A peak; up to 8.0L gas / 6.0L diesel; ~40 jumps per charge |
| Verdict | The differentiator / premium-niche pick — holds no charge so it never dies in the glovebox, isn't damaged by heat/cold, and lasts ~10 years. Ideal leave-it-in-the-car unit that's always ready. | The default best-overall. Trusted for honest (not inflated) amp ratings, UltraSafe spark-proof + reverse-polarity protection, and a genuinely pocketable size — the unit everything else is compared against. | The heavy-duty pick — doubles the GB40's output for trucks, vans, boats and diesels while keeping NOCO's safety pedigree. What serious truck/RV owners buy. |
| This page | See its case → | See its case → |
Same category, ranked by our research priority. Specs and price bands are approximate — confirm the current price on Amazon.
The Decision Receipt
- Why it's here
- The differentiator / premium-niche pick — holds no charge so it never dies in the glovebox, isn't damaged by heat/cold, and lasts ~10 years. Ideal leave-it-in-the-car unit that's always ready.
- Who should buy it
- Buyers who hate maintaining a charge, live in extreme climates, or want an always-ready trunk unit.
- Who should skip it
- Anyone whose battery can go fully dead with no other power source — the SuperCap must draw a few minutes of charge from the weak battery, alternator, USB, or another source before it can jump, so it's not instant-from-empty, and it can't double as a phone power bank.
- The main tradeoff
- You give up instant-from-empty jumping and power-bank duty to gain a unit that never dies in the glovebox, shrugs off heat and cold, and lasts about 10 years.
- What could change this
- If you'll actually keep a lithium pack charged, a NOCO GB40 or a GOOLOO jumps instantly and adds USB power; the SuperCap wins specifically for the neglectful owner or an extreme-climate trunk where a lithium pack would age out or die.
Built from the live Amazon listing, manufacturer specs, and owner-review patterns — not personally lab-tested. Prices are approximate; confirm the current price on Amazon.
What owners actually report
Aggregated from real verified-buyer reviews and long-term owner reports — not our own hands-on test. Basis: Aggregated from independent hands-on reviews (Nerd Techy, The Gadgeteer), an Expedition Portal overlander owner thread, and BobIsTheOilGuy/Amazon Q&A; several first-hand owner reports rather than a large star-count sample.
- Needs residual voltage or external source. A stone-dead 0V or shorted-cell battery can't charge the capacitor, so you must feed it from USB/power bank or another car's battery.
- Rapid self-discharge once charged. The supercapacitor loses usable charge within roughly 10-30 minutes, so it must be charged right before each crank rather than kept ready like a lithium pack.
- Limited output on hard-starting engines. One owner found it insufficient to crank a cold 2.5L diesel at 15-17F despite the 4.0L-diesel rating, and each miss means recharging before the next attempt.
The core selling point owners echo: with no battery to degrade, the capacitor is rated for very long maintenance-free life (maker cites 10-20 year lifespan / thousands of cycles), though long-term owner data is still thin and it carries only a 1-year warranty.
Research trail
How every recommendation is built. We research, compare, and cite — we don’t take payment for placement, and we don’t claim to personally lab-test.
- Specs & manuals checked
- Warranty & support reviewed
- Owner-review patterns analyzed
- Price history tracked
- Independent reviews cross-referenced
- Safety / recall checks where relevant
Decided it’s the one?
Check the live price and exact model on Amazon.
The Best Portable Jump Starters, Compared
See how it stacks up against the field in Jump Starters.
More in Jump Starters
Hulkman Alpha85 2000A Smart Jump Starter with LCD Display
The premium smart pick — the LCD shows exact battery %, voltage and jump readiness (no guessing at LED dots), plus fast 65W USB-C recharge and a strong review record. Shoots well for a premium reel.
Fanttik T8 Apex 2000A Jump Starter with LED Display, 65W PD
The design-forward premium compact — smart readout + fast recharge + a genuinely premium industrial design that shoots beautifully as a reel hero, still handling up to 8.5L gas / 6L diesel in a pocketable body.
GOOLOO GP4000 4000A Peak Lithium Jump Starter
The high-power-for-the-money pick — 4000A covers essentially all gas engines and up to 10L diesel at a price well under premium-brand heavy-duty units; a consistent reviewer value favorite.