MINI E #140 heading to Oxnard for a visit

Just had a call from my service advisor at Long Beach MINI. During my recent service visit...approx 400 miles ago...they ran some tests on the battery and just now have the results back. Appears they may need to replace the entire battery or parts of it and #140 needs to go to Oxnard ASAP. While car is driving fine, I was told the range could diminish over time, without being serviced. Will follow up with more details when I have them. Dropping off in the morning. Wasn't told how long it will take to fix but hopefully not to long. Currently at 4200 miles and loving the gas free E!