STROMTANK S-2500 Quantum MKII

Can you call it “the new middle class”?
In a way, yes, but only if you orientate yourself within our device hierarchy.
Otherwise, the S2500-Quantum is of course absolutely top class. In this model,
too, we have implemented everything in line with our uncompromising approach.
The so-called high performance balancer provides this unique charging control,
ensuring both ideal battery performance and battery life at all times.

For more info's:
https://stromtank.com/s2500-quantum/