Had my battery fail on me sporadically, ecu was showing 6 volt crank (should be 9v) and 11.8 volts on charging (should be 13-14v) I always carry a boost pack but it was becoming a bit repetitive. Specd up a battery online, and went for the cheapest option, turned out to be wrong (half the size) the guy in the store rectified this for me and refunded the amount for the original battery, cold weather will catch you out so it always worth doing a battery health check, the LION 063 has a 3 year guarantee so you can just fit it and forget about it. Reasonably priced for the size, no issues starting anymore and no concerns that the lack of crank voltage could be damaging my starter motor. 2.8 v6 turbo Saab