Exact same symptoms as my "other" car.....cured by replacing battery (old battery approx 1 yr. old).
Perormance of individual cells within batteries can erode over even a short period of time causing the above symptoms.
Also (as I understand it), automotive batteries are not the same as deep cycle batteries & do not tolerate being fully (or close to) discharged very much (less as the battery ages). Result is that the battery may not fully recharge either.
Battery life seems to be more related to luck associated w/ a crap shoot.
