That covers all the requirements. Leave it on the battery. It will allow the battery to self-discharge and then top it up again. It also has temperature compensation. I'd say you have a very good charger at a good price.
It doesn't matter how long you leave it between using the battery, that charger will keep it in the right condition for immediate use if you leave it connected up. I'd put it on a protected
plug to be certain that if anything goes wrong it will simply trip out. HTH
