I've had this one for a couple of years and it seems very well made. I've never actually needed it on the road, but bought it after I had to use my little toolkit emergency pump with a 2" stroke to help a lady pump up her fat-tire tube and that wore out my forearm and patience, so got this one. Due to its rugged construction, it is a little heavy, but on an e-bike who cares? I carry it, and other stuff, in a handlebar bag in the rear basket that I can flip out of the way: https://www.radowners.com/index.php/topic,9800.msg24885.html
I just did a pre-season charging on it and it still seems to work perfectly. One nice feature is that you can set the pressure you want for your particular bike and it'll shut off when it hits that, making it easy to use. The display is illuminated as well; handy for night work. You can also use its battery to recharge a cellphone with the included USB cable and it has a built-in LED flashlight function as well.
https://www.amazon.com/gp/product/B07ZFQJQRV
I just did a pre-season charging on it and it still seems to work perfectly. One nice feature is that you can set the pressure you want for your particular bike and it'll shut off when it hits that, making it easy to use. The display is illuminated as well; handy for night work. You can also use its battery to recharge a cellphone with the included USB cable and it has a built-in LED flashlight function as well.
https://www.amazon.com/gp/product/B07ZFQJQRV