DIY Battery Replacement?

Word to the Mother Ship…

I posted a while back ago about my MnM telling me it’s battery is low and what I should do about it. The poor thing has already been serviced before the whole process took WAY too long (just about 5 months 'round trip…). The MnM is still working but the “Battery Low” message on start-up still lingers…

Before I go ham on this thing - anyone know for sure whether or not changing out the battery inside the MnM is DIY-friendly? Ultimately, I’d rather pay up front and do the work myself to avoid another 5-month ordeal.