CTEK RB 3000 Jump Starter review
CTEK RB 3000 Portable Jump Starter - 3000A Battery Peak Current
By Tom Calder
A solidly engineered, compact booster with proper reverse-polarity and spark-proof protection, but CTEK charges a premium versus rivals and — unusually for this category — doesn't publish an engine-litre coverage figure, so you're working from amp numbers alone.
- Best for
- Drivers who want a compact, well-made jump starter that doubles as a genuinely useful USB power bank and torch, and are happy to pay a premium for CTEK's build quality and safety protections.
- Skip it if
- You want an on-the-box litre-engine guarantee for a large diesel van or 4x4
as of 4 Nov 2026, 20:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Reverse-polarity protection and spark-proof technology built in
- Doubles as a genuinely useful USB-A/USB-C power bank (16,000mAh/59.2Wh) with a 3-mode LED torch
- Compact, IP65-rated build with a 2-year warranty
Worth knowing
- No published engine-litre (petrol/diesel) coverage figure — CTEK quotes only current (1300A start, 1980A max cranking), making it harder to size against your vehicle than rivals that state '9.0L petrol/7.0L diesel'-style claims
- Noticeably pricier than similarly-rated 3000A boosters such as the NOCO Boost GB150
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Our review
The smaller of CTEK's two lithium boosters: a 59.2Wh pack rated at up to 1,300A start current and 1,980A maximum cranking current, with CTEK quoting 30 starts from one charge and a 30W USB-C power bank on the side. It weighs just over a kilo and holds its charge for up to six months. It suits a household with one or two ordinary petrol or diesel cars that wants a well-engineered pack rather than the cheapest one.
What the numbers mean
CTEK gives three current figures, and only one of them is on the box. The 3,000A battery peak current is the headline. The start current is up to 1,300A, and the 1,980A maximum cranking current is the highest figure CTEK gives for turning an engine over. Set against the CTEK RB 4000, rated at 2,060A, the RB 3000 gives up only 80A of cranking current; what it gives up is battery, 59.2Wh against 88.8Wh, which CTEK translates into 30 starts a charge against 45. The 16,000mAh polymer lithium-ion pack is rated for 500 charge cycles. CTEK's product page calls it ideal for cars, SUVs, pickups, vans and campers up to 8L petrol, and gives no diesel figure, so a diesel owner is working from the cranking current alone.
On the road, in a British winter
At 1.028kg by CTEK's figure and 239 by 107 by 40mm, it is the size of a hardback and lives in a door pocket or under a seat. CTEK rates it to jump start from -20°C to +55°C, though its support site says cold weather and big engines both reduce the 30 starts. The manual asks for no more than three attempts in a row, five minutes apart, so the pack does not overheat. CTEK says it holds charge for up to six months, and the manual asks for regular recharging, which suits a routine of topping it up when the clocks change. The connection order, and the cases where you should not try at all, are in how to jump start a car.
How it compares
NOCO's Boost GB70 is the closest rival: 2,000A peak, a stated 8.0L petrol and 6.0L diesel rating, a 56Wh battery, 1.9kg and a 400-lumen seven-mode torch. The NOCO Boost X GBX75 carries more battery at 74Wh, weighs 1.71kg, refills in 1.7 hours over 60W USB-C against CTEK's 2.5 hours at 30W, and states 8.5L petrol and 6.5L diesel. CTEK's advantages are a published cranking figure and a lighter case. CTEK's warranty is two years; NOCO's spec pages say one, though its warranty terms allow UK buyers at least two. The full field is on our jump starter comparison.
Living with it
Charging is USB-C Power Delivery at 30W, 2.5 hours to full by CTEK's figure, from a charger you supply; the manual says the mains adapter is sold separately. The power bank side gives USB-A Quick Charge 3.0, USB-C PD at 30W and a 12V output, and the LED torch has standard, strobe and SOS modes. The shell is IP65 only with every port closed; the manual says the rating lapses while it is charging or connected for a start. The warranty is two years, and CTEK's own support site handles questions.
Safety and storage
CTEK's manual puts storage at -20°C to +50°C with a daily average of 0°C to +25°C, and says to keep it out of direct sunlight and heat, so the pack should not spend summer on a parcel shelf; indoors and charged is the right home, going into the car for winter journeys. Reverse-polarity protection and spark-proof technology are built in, and CTEK says never to charge or start a frozen battery. Our lithium battery fire safety guide covers charging at home and what to do with a damaged pack. If the car's battery goes flat more than once, the fix is a garage or a maintenance charger, not a bigger booster.
Our verdict
Buy the RB 3000 if you drive an ordinary petrol car and want a compact, well-built booster with a two-year warranty that doubles as a decent power bank. Skip it if you run a diesel and want a stated rating, because CTEK does not give one for this model while the RB 4000 and NOCO's packs do, or if you want the least expensive pack that will start a small hatchback, where a NOCO GB40 or a Ring unit on our comparison page does the job.
A researched review, built from the maker's specs, manual and UK listings; facts checked 21 Oct 2026. Sources: CTEK — RB 3000 product page and specifications; CTEK — RB 3000 user manual (storage and charging temperatures, IP65 conditions, start limits); CTEK support — How many starts on a single charge (RB 3000 / RB 4000); CTEK Magazine — Portable jump starters: how to choose (charge retention up to six months).
Who shouldn't buy this
Don't buy it if you want an on-the-box litre-engine guarantee for a large diesel van or 4x4 — CTEK doesn't publish one, so cross-check the 1980A max cranking figure against your vehicle first, or consider a rival that states a litre rating directly. Also don't leave it in a hot car in direct summer sun, and recharge it every six months or so if it's sitting unused — like any lithium pack, heat and long dormancy both degrade the cells.
Key specs
| Peak current | 3000A peak |
| Engine coverage | No litre/displacement rating published by CTEK |
| Capacity | 16,000mAh / 59.2Wh, 500-cycle battery life |
| Extras | USB-A + USB-C power bank output |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for A compact glovebox backup that gets a flat petrol car or small diesel going without waiting for a breakdown van.
as of 4 Nov 2026, 20:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for Drivers who need to cover a bigger diesel - a van, 4x4 or larger family car - as well as ordinary petrol cars, in a pack that still fits in a glovebox.
as of 4 Nov 2026, 20:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for Drivers who want one mid-size jump starter that covers most family cars and small diesels, rather than buying NOCO's biggest (and priciest) unit just in case.
as of 4 Nov 2026, 20:07 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Questions
Will the CTEK RB 3000 start a diesel?
CTEK publishes no diesel rating for the RB 3000; its page says up to 8L petrol. Its maximum cranking current of 1,980A is close to the RB 4000's 2,060A, but CTEK only states a diesel figure, 8L, for the larger pack. If you run a diesel, ask CTEK's support team about your engine or choose a pack whose maker states a diesel rating.
How long does the CTEK RB 3000 take to charge?
CTEK quotes 2.5 hours from a 30W USB-C Power Delivery charger. Slower chargers work but take longer, and CTEK gives no figure for them.
How long does the RB 3000 hold its charge?
CTEK says up to six months, and its manual asks you to recharge it regularly. Checking it when the clocks change in spring and autumn keeps it inside that window.
Is the CTEK RB 3000 waterproof?
It is rated IP65, dust-tight and protected against water jets, but only with every port closed. CTEK's manual says the rating no longer applies while it is charging or connected to a battery, so keep it out of the rain during a start. It is not designed to be submerged.
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