i've had a 2019 JCW in storage with no battery since september. it isn't coming out of the deep sleep until the end of may. while in a conditioned space, there was no electric source to enable a tender, so the battery was pulled and no attempt made to keep the parasitic sources alive. in Gen 2 cars, i recall a procedure to wake up under such circumstances....failing to do so caused various codes and inoperable functions, forcing a trip to a dealer. anyone aware of similar procedure for Gen 3 cars? if not, i'll be on an adventure and report back what happens.

 

received my 6lb lithium battery and hooked up to the mini after several months with no power. car started up fine with no codes. will be awhile before i can take it out for a test run, but so far, so good.