Hi Andre

> can you give me any internet link where i could maybe buy those
> accumulators

I bought them at a local shop. The internet site is:
www.conrad-electronics.de

I do not know the exact naming.

> do they have a separate charger

They are standard accumulators, which can be used with standard
chargers; but since I never had a accumulators before, I had to buy a
new charger.

> i have two portable cabinets, how long does the batteries would last

I don't know. Mine single row cabinet lasts for around 4 hours or longer.

Which one you have to use is quite simple: check the amount of ampere
youre modules are drawing, think about how many hours they should run
without a break, this gives the value for the capacity which is given in
mA/h



If you use two accumulators for starting a car they will last long
enough for longer installations.

Florian