Bought a GBX75 last week which is supposed to have the new extreme boost technology as the GBX155, but with 2750A, I fully charged it but wouldn’t even register when I tried to jump start a little Massey 390T. Charge lights on the NOCO were all flashing in sequence instead of being a solid green light; tried several times and play around with the crocodile clamps but all I got was the flashing lights and a regular loud clicking sound from the booster every two or three seconds.
Took it back to Halfords and they refunded my £250 without any quibble. Luckily I wasnt actually relying on it but rather just trying it out on a dead battery. I know that NOCO are supposed to be the best on the market but this has put me right off their products.
PS Also impossible to find an independent main UK importer to ask for informed advice and problem solving etc.
Mine didnt work the first time I tried it, dont know what I did wrong imo, maybe wasnt a good enough earth even though it lit up as if it was all connected and ready to go.
Used it successfully yesterday and this afternoon though.