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M81 GX400 Portable Car Jump Starter 12v 4000A Reviews

4.4 Rating 16 Reviews
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The M81 GX400multi-function intelligent jump starter is the perfect companion for petrolheads, boaties, bikers, off-roaders, outdoor adventurers, campers, and anyone else who needs to crank an internal combustion engine to keep or get moving.Boasting a high-power delivery potential rivaling and exceeding most conventional lead-acid batteries, the M81 GX400 can start just about anything running on a 12V system - car, bike, boat, you name it. Capable of a peak of 4000A, and a sustained 850A for cranking, the tiny jump starter packs some serious punch. The M81 GX400 also provides the added convenience of being able to double as a work, safety and emergency light, as well as a power bank for all of your portable devices including phones and tablets. The GX400 also has the added feature of fully supported 10W wireless charging.Its ruggedised case provides excellent shock and knock protection, and its IP65 rating allows it to serve in a wide range of environmental conditions, whether you are off the beaten track, outside the heads or anywhere else you might need to take it with you for peace of mind.Polarity and Overload ProtectionFeaturing sophisticated circuitry capable of voltage sensing and able to detect a range of fault conditions, the intelligent jumper leads included with the GX400 take the risk and unwanted drama out of emergency situations. One can be forgiven for connecting leads backwards in a stressful situation, and traditional jump starters would happily let you fry your vehicles electronics in such an event, but the GX400 will not allow a discharge when reverse polarity is detected.Equally important is the spark arresting technology, preventing potentially dangerous sparks occurring if the clamps accidentally touch together whilst reaching into the engine bay.Charges USB devicesUSB connectivity can mean a lot of things - first and foremost, the need for yet another specific cable with a bulky transformer is gone, as the GX400 can be charged through its PD60W compliant USB-C port. This means that any power source capable of providing enough juice for 'fast charging' on your mobile devices can also charge the GX400.The usefulness doesn't stop there, as the QC3.0 capable USB-A port allows the GX400 to serve as a mobile power bank to charge other devices, and the pice de rsistance is the inclusion of a 10W wireless charging function, making the GX400 a truly versatile piece of kit.Long-lasting, 20,000 mAh Lithium BatteryCharging a device before using is one thing, remembering to charge it before a trip is something else entirely. The GX400 boasts a potent lithium ion battery with an impressive 20,000mAh storage capacity, and what's more, the charge is good for up to six months standby.Built-in FlashlightKilling multiple birds with one stone, the GX400 also features an integrated array of LEDs, capable of outputting 300 lumens, and also controllable by the user, making the GX400a versatile tool indeed.The selectable modes include a work light, as breakdowns rarely occur in a well lit workshop environment; a stroboscopic hazard light, handy in hairy situations; and an SOS mode, for when the going is a little too tough.Up to 35 Starts per ChargeDespite its small size, the advanced lithium batteries in the GX400 are capable of delivering a starting charge over, and over, and over again - there are few things more frustrating than jump starting a car in a tricky predicament, only to have it stall a few metres further into a worse situation. In testing, the GX400has performed up to 35 starts on car with a flat-but-healthy battery, meaning there is more than enough to start the whole neighbourhood.Compact SizeAphorisms like 'good things come in small packages' often ring true, and you might be thinking a powerful jump starter, capable of a mighty 850 cranking amps, protected in a durable case, with an IP65 ingress protection rating, would be a suitably massive unit. The powerful GX400comes in a form factor small enough to fit in a glove box, tool kit, or any nook or cranny available for storage in your vehicle.For added convenience, the GX400comes with both a storage bag and a carry case, keeping it and its associated pieces safe and secure for when you need it.Fast ChargingRapid charging is a reasonable expectation in todays fast-paced environment, and that is exactly what the GX400 provides. Capable of achieving a full charge in 3 hours on the ideal 9V @ 2A input. Charging from lesser power sources is also supported, so the GX400 is not going to leave you high and dry when conditions aren't perfect.Starting Capacity up to 10L Petrol & 8L Diesel*Real-world applications are always the litmus test that separates good products from good marketing. The GX400, boasting 4000A peak and a sustained 850 cranking amp output, is capable of starting petrol engines up to 10.0L and diesel engines up to 8.0L.* Figures tested for a vehicle with battery charge approximately 11V. When tested on 0-5V battery, the GX400 can start engines up to 8L petrol/6L diesel.No Extra Vehicles RequiredExtraordinary events often mean uncontrollable circumstances; traditional jump starts require another vehicle close by - and preferably operational. Situations requiring a jump start rarely allow the luxury of breaking down in an open space with ample lighting, and easy access to another car with room to use jumper leads. The convenience of a portable, powerful jump starter means all of this is foregone, turning your bad day into a minor inconvenience.Large LCD ScreenLeaving nothing to chance, the GX400also possesses an easy-to-read 4-LED display, showing state of battery charge. The bright LED's translate to visibility under all conditions, preventing an awkward situation of fooling around when the times are good, and finding out when the times are bad.Load-sensing isn't the only job that the ingelligent jumper leads perform either, the built in display screen showing fault conditions - it can even be used to test the battery when unplugged from the main unit!

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Only used once to check...works perfect
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Posted 1 year ago
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Posted 1 year ago
Definitely worth getting your hands on ! Helps every time
2 Helpful Report
Posted 1 year ago
I recently added the M81 GX400 Portable Car Jump Starter to my kit, and I'm glad I did! Although I haven't had to use it yet, it's a vital tool that provides peace of mind. A portable jump starter is a must-have for any car owner, saving time, money, and stress in case of a dead battery. I'm satisfied with the build quality and features. I'll update this review once I've used it in a real-world scenario. For now, 5 stars for the sense of security it brings! — @yam4wd
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Posted 1 year ago
Super handy and easy to use. Saved me from having my mate bring his car and cables
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Posted 1 year ago
Very happy with this product. Highly recommend it. It works.
2 Helpful Report
Posted 1 year ago
Very fast delivery. Solid jump starter, grat price, works well.
1 Helpful Report
Posted 1 year ago
Author didn't leave any comments.
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Posted 2 years ago