When I first saw the M1, I found it too good to be true. The M1 looks like a 10,000mAh power bank, has a digital LCD display and is advertised as capable of inflating up to 100psi. Most car tires are inflated to around 30 to 40psi only so 100psi is a big deal, especially for a small battery-powered automatic pump like the M1.
So one day, I decided to go ahead and purchase one from Banggood for about $69 with shipping. My unit has an all-black casing which I believe is less popular than the white version. When it first arrived, my initial impressions were that the M1 is quite well-built and has that premium look and feel to it.
- Color: Black / White
- Size: 148.5mm x 77mm x 26.5mm
- Material: Plastic casing with matte surface
- Net weight: 427g (with hose and presta/schrader adapters)
- Measurement units: psi/bar/KPA/(kg/cm2)
- Battery capacity: 2750mAh
- Output: 3.7V / 10.2Wh
- Input: DC 5V / 1.5A
- Charging port: Micro USB
- Maximum output pressure: 100psi
As expected, the M1 is about the same size as my 10,000mAh power bank and weighs a bit more if you include the inflator hose and adapters. A key feature of the M1 is the digital LCD display with backlight that provides you with an accurate pressure reading of up to 0.1psi. The display is small but bright enough and the text appear clear and sharp.
There are four buttons in total and a micro USB port which is used for charging the unit. Of the four buttons, the power button is the largest. It also serves as the inflate button when the unit is on. Another button lets you toggle between units of measurement and the remaining two buttons let you control the pressure value (increase or decrease).
Using the M1 is fairly easy. To turn it on, press the power button for about 3 seconds. Once it’s on, you can set your desired air pressure by using the “+” or “-” buttons. To change your measurement unit, simply press the “U” button. After you’ve set your pressure, the M1 will automatically save the value after 5 seconds. To start inflating, press the power button once and you’re in business. You can stop the M1 at any time during inflation by pressing the power button again. The unit will only stop inflating once it reaches the pressure that you have set earlier.
The inflator hose comes with a screw-in adapter for fitting onto Schrader (for car and motorcycles tires) and Presta (bicycle) valves. Two more adapters are available for other inflatable devices such as flotation devices and soccer balls.
When it is inflating something, the M1 is a bit loud, though not as loud as other industrial-grade pumps. It produces a fast and rapid wheezing sound at a rate of 65 – 70dB — the sound level that is typical for a conversation. It may not be loud enough to bother your neighbor but still loud enough to wake up someone sleeping within a few meters. Another issue with the M1 is its slow rate of inflation. Being such a small pump, it’s not surprising that the M1 takes a while to inflate anything.
This is mainly because the unit spits out only a small amount of air with each wheezing spurt due to the small size of its pump. With that said, it is certainly no match against a trusty floor pump when it comes to speed. The M1 takes about 5 minutes 25 seconds to inflate a fully deflated 700 X 23C road bike tire to 93psi. It takes close to 7 minutes to achieve a pressure of 100psi. If you’re going to inflate a tire that requires a much larger volume of air such as car or motorcycle tires, then expect to wait even longer.
UOMI is marketing the M1 to a wide spectrum of customers from cyclists to water sports enthusiasts. Even housewives may find it useful. In other words, simply anyone who needs to inflate stuff regularly will find the M1 useful. With that said, it is a bit difficult to determine which type of customer will benefit the most from the M1.
At 427g, cyclists who ride hilly routes may find it a bit too heavy to carry around considering that a small hand pump such as the GIYO GP-41S weighs approximately 100g only and doesn’t require battery power. Car drivers and motorcyclists probably will not mind the weight but the M1 takes terribly long to fill up tires that require high volumes of air (think car tires) that these users might just be better off carrying a mini floor pump with them.
However, not all is bad with the M1. I believe the elderly or people with certain physical or medical conditions that prevent them from using a manual pump, may find it very useful despite its flaws. In my case, I use the M1 as a pump to accurately achieve the right tire pressure for my bicycle tires.
What I typically do is use a floor pump to pump my tires up to 80psi before topping them off using the M1. My rear tire pressure is 96psi with 93psi for the front. This means the M1 is used to pump only 23 to 26psi of pressure for each tire. With its digital LCD display and automatic cut-off, I am able to achieve tire pressure accuracy of about 1psi — something which is very difficult to achieve with my floor pump which provides accuracy of roughly 10psi. Bear in mind that the M1 can heat up quite a bit after about 5 minutes of work so using it to pump a road bike tire from fully deflated to 96psi is really taxing for the M1.
The UOMI M1 can be purchased from Banggood for $69.