Quote:
Originally Posted by BimmerMat135
I just tried to start my 1m after 4 month of winter storage earlier. Seem like the battery won't take any charge and my powerpack was to weak to start it up. I am now charging my powerpack and I will try again later but it's seem like that battery is on her last leg.
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For long term storage, either use a (CTEK) charger, or disconnect the negative terminal. Disconnecting has bridged 6 months of storage for me. The car started as confidently as if with a fully charged battery.
Without either of these, our batteries will be drained within a month or 2 and dead beyond repair in ~ 3-4 months. If you have the alarm system & comfort access (in Europe less fast without rain sensor option) probably faster, these do not shut down power after 15-30 minutes after locking the car, like most fuse connections.