Our MH has been standing for a few weeks and I decided to start up the MH yesterday, the battery had really dropped and it was unable to turn over the engine sufficiently to start up. I eventually had to jump start it and it started right away. I had thought about taking the battery off and giving it a good charge but I don't know how this will affect the Alarm that is fitted? There is no information in the (Sigma) instruction book on if and how to re-set the alarm should the van battery be removed? Am I going to have problems if I totally remove the battery to charge it or is it simply a matter of re-connecting the battery and (if) the alarm goes off just turning it off with the key-fob? Will the Alarm re-set itself, I don't know if it has a built in battery or circuitry to remember the code. The van has had a good run-out today so it has put quite a bit of muscle back into the battery, I would like to know for in the future though as to whether it is safe to remove the battery? I assume it must be ok, as some garages disconnect the batteries to carry out certain types of repairs don't they?