zefon z-lite DC powered IAQ sampling pump

Does anyone use this sampling pump?
Is it worth having the battery feature or is it more of a hassle?
Seems like it would be worth having IF it works as advertised.

Having calls for testing of areas without direct power and don’t want to waste time running ext. cord.

Any thoughts on this model is greatly appreciated.
Thanks much,

I use a battery pack with a built in 110v converter such as used to jump a car with. I can run my pump a total of 55 minutes with this battery pack.