Leaving battery disconnected ok?

[omodos]

hi all , long story, already been told by one guru that removing the battery (for say 1 day) is fine, and that as long as you disconnect and reconnect correctly should X5 will be fine, but thought I'd bombard those on the forum too....basically looking to remove my suspect battery...get it load test checked at auto store....and depending on outcome either get it replaced or I keep existing one and in both cases reconnect and put X on ctek charger to charge up either the new one or the old load tested one.....

Just curious as have heard a few horror stories over batteries going flat for whatever reason, and then new ones installed but instrument clusters packing in or key fobs no longer working....but seems to be related to those who initially had flat batteries and jump started the wrong way etc or left keys in ignition during battery change out process....any feedback would be great