FanttikX8 Ace Bike Pump 150PSI Fast Portable Tire Inflator, Cordless Rechargeable Electric Bicycle Air Pump, Auto Stop, with Presta and Schrader Valve for Fat, Mountain Bike, City Bike, Road Bike

Absolutely wonderful, high quality, effective product.

I have an electric skateboard with all-terrain pneumatic tires (200x50mm tubes). The rechargeable pump for my car works well for at-home inflation, but its much too big to carry as part of skateboarding kit. This pump is just as functional (USB-C charging, emergency light, and settable pressure). Just like the full size pump, you set the pressure and inflation stops at the target pressure. In a way, it's better than the full-size pump, which uses a lever-style quick-release chuck, which loses a little bit of air when you detach it from the valve. Negligible loss for a high-volume like an automotive tire but more significant for a lower volume tire like a pneumatic skateboard tire or even a bike tire. The screw-on style chuck of the Fanttik pump has proven lossless so far, maintaining the target pressure when detaching from the valve.There are different modes such as ebike, city, etc, but the target pressures don't really make any sense and I've ignored them. It's much better to simply know your target pressure and manually set it. Used that way it's quite simple to use.I have only tried this with my skateboard tires and no problem with all four wheels...plenty of battery left over. However, I haven't really tried to test just how long it will go before running out of battery...or shutting down to prevent overheating the pump.The instructions, which are competently translated into English, are poorly organized with needed instructions scattered through the instruction sheet. Thankfully it's pretty short and quick to scan the whole thing. In addition, there are no clear instructions on charging the pump. The pump has a four segment battery indicator and it appears that each segment blinks as the pump charges. I believe that when all four segments are lit and not blinking the pump is fully charged, but that's not stated anywhere in the manual. I believe that's a pretty reasonable and intuitive guess, but it would have been nice if it were written in the manual.

Update: the original pump I received had problems. The seller contacted me and sent a replacement pump. The replacement works as expected. Some notes in the pump:1. It uses about 25% of the battery to pump a road bike tire to 100 PSI.2. A little bulky to take on rides, but otherwise a reasonable size.3. This device uses the same approach as others for presto - a screw in valve adapter. It creates a good seal but is a bit of a pain compared to the locking air chucks used on floor pumps made for presta valves.4. They have a different chuck available separately which is more like a normal floor pump. It works much better than the screw on brass valve adapter included with the pump.5. There is a quick option to select 100 PSI - much easier than other pumps I have tried. This one seems to anticipate road bike use.It would be better if it were slightly smaller and slightly lighter. It would also be nice if it could be a back up battery bank.Overall the seller was exceptionally responsive and resolved the concerns below.

I am updating my previous review. The company was very responsive and replaced my apparently faulty unit for a working one. Replacement pump was received quickly and has been working without problem. I am honestly impressed with the customer service. Very happy with the purchase.

Works well. But the battery does not last long.