Citroen Berlingo First electric Venturi

I´d be interested to hear from other users of this vehicle about its reliability and performance.

Of particular interest is the ZEBRA battery in the 2012 model: it should be kept warm at 250°, so keeping it plugged in when not in use seems necessary. This increases electricity consumption, but does it also shorten the longevity of the battery?

Also, any comments on the brushes which seem to be vital to protect the commutator?