Over the last couple of years, I have owned two different mini pumps. Both of them have failed in the first year. Ironically these pumps had very little use before failing, because they were basically only used in an emergency except maybe 2 or 3 occasions testing them when first aquired. (I have a blow Joe floor pump for topping up tyre pressures at home as and when required, and it is excellent. I also use it when repairing tubes at home). Although others will probably not agree with me, I am now of the opinion that mini pumps are simply not fit for pupose. I can only speak as I find. To make matters worse, the latest saga is an 18 mile round trip drive to the cycle shop & back to drop the pimp off. The pump has to be sent away to the suppliers- estimated time 2 - 3 weeks. Then another 18 mile round trip to collect "an item that I no longer have confidence in" in terms of relying on it in an emergency. Plus, cycling without a pump now, and relying on my C02 inflators. In the grand scale of things happening in life, it is small fry. I remember when you could buy a cheap plastic pump for under a fiver and it was fine. If it eventually packed up you just threw it away, or maybe put another washer in it. Lol.