battery charging

[anon125]

In winter we normally remove the batteries and put them on the charger for the winter. using a CTEK Multi US 7002.
they seem to like it!
this winter someone has offered to let us store the MH in their big garage.
they say if we just plug in the MH then it may destroy the batteries.
so they are suggesting charge them one week a month.
this may be because they mistrust trickle battery chargers!

if we use the CTEK while the batteries are in the MH WITHOUT plugging the MH in to the electricity will the batteries be okay?
the batteries will still be connected to the MH as per normal usage.

the garage owner is an experienced RVer.
thanks all

[2oldman]

anon125 wrote:
they say if we just plug in the MH then it will destroy the batteries.

if we use the CTEK while the batteries are in the MH WITHOUT plugging the MH in to the electricity will the batteries be okay?

I don't know why an experienced RVer would say that without knowing anything about your setup.

I don't understand. Isn't the CTEK a charger? How does that work without power?