10 Best Battery Jump Starter 2025 in the UK

The NOCO Boost Plus GB40 is a compact and powerful car jump starter, boasting 1000 peak amps. This makes it capable of starting up to 6.0-liter petrol and 3.0-liter diesel engines, which is impressive for its size. It's designed to be portable, weighing just 2.4 pounds, and with dimensions that make it easy to store in your car. The battery capacity isn't explicitly mentioned in mAh, but it supports up to 20 jump starts on a single charge, indicating robust performance.

Additionally, it's a multi-functional device, serving as a portable power bank for USB devices and featuring a 100-lumen LED flashlight with various modes, including emergency strobe and SOS. These extra features add considerable value, especially in emergency situations. Safety is a top priority with the GB40, as it includes spark-proof technology and reverse polarity protection, ensuring you can use it without fear of incorrect connections or sparks.

The rugged, water-resistant design (rated at IP65) and rubberized casing make it durable and suitable for a variety of climates. On the downside, users needing to jump-start engines larger than 6.0 liters (petrol) or 3.0 liters (diesel) will find the GB40 inadequate. Additionally, while it offers great functionality, its reliance on lithium batteries means it requires proper care to maintain longevity. The NOCO Boost Plus GB40 is highly suited for everyday drivers looking for a reliable, easy-to-use, and multi-functional jump starter that provides peace of mind during unexpected battery failures.

The FLYLINKTECH 4000A Peak Car Jump Starter is designed for those who need a reliable, portable solution for starting vehicles with large engines, up to 9.0L gas or 8.5L diesel. While the advertised peak current is 4000A, the detailed specs mention a 2500A peak, which may cause some confusion. Nonetheless, it is a robust option for most cars, trucks, and even boats. Its 13200 mAh battery capacity doubles as a power bank, allowing you to charge other devices, which is quite handy. Weighing just 380 grams and with compact dimensions, it’s easy to carry around in your vehicle.

For users who frequently find themselves in adverse weather conditions, the IP67 waterproof and dustproof rating is a big plus, ensuring it performs even in rain. It also features four LED light modes, useful for emergencies or nighttime use. Safety is prioritized with its intelligent protection systems, including protection against explosion and reverse polarity, making it safer for users who might not be familiar with jump starters.

However, the lower than advertised peak amperage might limit its effectiveness with the largest engine sizes. The absence of detailed charging speed information for its power bank function might be a downside for those using it to charge smartphones or tablets. Nonetheless, its wide compatibility with various vehicles and additional features like an EC5 cigarette lighter adapter make it a versatile tool. This jump starter is best suited for drivers who need a portable, multifunctional solution for moderate to large vehicles and who occasionally venture into the outdoors or travel in diverse weather conditions.

The AstroAI S8 Car Battery Booster is a compact and powerful jump starter designed to quickly revive 12V vehicle batteries, including cars, motorcycles, SUVs, and lawnmowers. With a strong peak current of 1500 amps, it can jump start engines up to 6.0L petrol and 3.0L diesel, covering most personal vehicles. Its high-rate lithium polymer battery is portable, weighing around 800 grams and small enough to fit easily in your glove box or travel bag, making it handy for emergencies on the road.

A smart boost mode detects very low battery voltages and helps start fully drained batteries, which adds extra usefulness when facing stubborn dead batteries. The included metal clamps and smart jumper cables provide protection against heat and electrical issues, while built-in safety features guard against reverse polarity, overcurrent, and short circuits, ensuring peace of mind during use.

While the exact battery capacity in mAh is not listed, the jump starter’s performance and protective features indicate a reliable power reserve. Although some users may note the 800-gram weight as heavier compared to ultra-light models, this is typical for the power it delivers. For those seeking a user-friendly, compact, and safe jump starter capable of handling most everyday vehicles, the AstroAI S8 represents a strong option.