There seems to be new version for Xiaomi airpump. You can only get it from China atm. Xiaomi Mijia Air Pump 2 Pro
Seems to have pretty impressive specs compared to v2. Operating voltage 10,8V vs 7,2V and 2500mAh vs 2000mAh:
https://www.aliexpress.com/item/1005007519412436.html