This pump has an elegant design and a very intuitive user interface. It is portable and uses a built-in rechargeable battery that can be conveniently charged via a 5V 2A micro USB port; No need to connect 12V outlet. The user manual is written in 9 languages (English, Traditional Chinese, Spanish, Korean, etc.). I used this pump to inflate the 19" Gemini wheel tires on my 2020 Tesla Model Y with an empty charge in an ambient temperature of 6 degrees Celsius. (43 Fahrenheit). Inflating each tire from 34psi to 42psi took a whopping time 6.5 minutes A full charge (2000mAh) managed to inflate three tires to 42psi (up from 34psi) and the fourth to 40psi before the battery died.In other words, a full charge allows you to use it of less than 6.5 x 4 = 26 minutes, as opposed to the 30 minutes stated in the manual This is a bit disappointing, you could use a larger battery.
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