[Twointje]

I would consider MAAS SPS-50-II. I got it currently and it's working fine. Only issue I see is that it is only 50A constant and 55A max. Adjustable from 9-15V. If 50A is enough for you then it's pretty good option it costs ~150€. I'm currently considering getting a server PSU that can deliver 140A.

I've actually considered the by you recommended powersupply as well.
However, I've had contact with the manufacturer (please note that this unit is sold by different brands) - and that it was NOT advisable to use this product for programming.

The response I got (translated, as the conversation was in Dutch): "Our experience is that the battery doesn't always gets the 'big blows' in power draw and that this would use the safety too much - sometimes leading into blown fuses or worse"

But allot of peole are using this device the MAAS SPS-50-II , specially on the German forums like Motor Talks.
They are all happy with this device , i am considering the Telwin Doctor Charge 50  but asked here for some advice from peole who are using it bud sofar did not get any.