ETENWOLF’s Zephyr S3 portable inflator combines a dual-cylinder pump rated at up to 35 liters per minute with a 7,800mAh battery and a maximum pressure of 160 PSI, or roughly 11 bar. The unit is designed for car, motorcycle and bicycle tires as well as sports balls, and includes automatic shutoff once a selected pressure is reached.
The company says the Zephyr S3 can raise a 235/45 R18 tire from 2.06 bar to 2.4 bar in under a minute. That claim concerns a pressure top-up rather than inflating a fully flat tire. ETENWOLF also says one charge can support up to 16 such adjustments, while active cooling is intended to allow consecutive tire inflation without long pauses.
- Dual-cylinder pump with up to 35 L/min airflow and 160 PSI maximum pressure
- Preset modes for cars, bicycles and balls, plus a manual pressure setting
- 7,800mAh internal battery with USB-C charging at up to 15W
- Digital display, automatic pressure cutoff and power-bank functionality
- 300-lumen LED light with illumination, warning and SOS modes
The inflator measures 13.4 × 17.1 × 9.6 cm and weighs about 1.07 kg. ETENWOLF includes adapters for multiple valve types, a charging cable and a carrying bag. Its power-bank capability and LED light are secondary functions, but could be useful during a roadside stop.
On Amazon, the Zephyr S3 had a 4.8-out-of-5 rating from more than 700 reviews at the time of reporting. Buyers have highlighted inflation speed, build quality and battery life, while noise is a recurring drawback. One user reported a measurement close to 98 dB at maximum power, although the testing conditions for that figure are not known.
The device was listed for €57 on Amazon Germany, down 23% from a stated €73.99 recommended price, with the promotion scheduled to run through October 25. Pricing, shipping terms and availability outside that storefront have not been confirmed.
