Benefit of Dual Purpose Battery; Starting and Deep Cycle
11-16-2002, 05:55 PM
#1
Addict
Rennlist Member
Rennlist Member
Thread Starter
Benefit of Dual Purpose Battery; Starting and Deep Cycle
I'm going to replace my battery with a seal unit, either the Optima or Exide Orbital, both are sold locally. Both companies make a dual purpose, ie. starting/deep cycle battery. Would there be any advantage to this type of battery because the car uses power even when it is not running?
11-17-2002, 12:12 AM
#2
Pro
Join Date: Oct 2002
Location: Tulsa, OK
Posts: 637
Likes: 0
Received 0 Likes
on
0 Posts
If your car is regularly driven, or spends off days on a trickle charger, there is no benefit to having a deep cycle battery per se in your Porsche.
Modern cars like the 993 will draw 1/2 to 1 amp/hour per day from a battery just sitting in a garage, though. So if your car sometimes sits for a week or more at a time, a battery built to 'deep cycle' may well last longer than a regular starting battery.
I think the Optima has 'Absorbed Glass Mat' construction, which makes it physically tougher than a normal starting battery, and also gives it deep cycle properties. It is a very good battery, but you pay more for its advanced construction.
Chip
Modern cars like the 993 will draw 1/2 to 1 amp/hour per day from a battery just sitting in a garage, though. So if your car sometimes sits for a week or more at a time, a battery built to 'deep cycle' may well last longer than a regular starting battery.
I think the Optima has 'Absorbed Glass Mat' construction, which makes it physically tougher than a normal starting battery, and also gives it deep cycle properties. It is a very good battery, but you pay more for its advanced construction.
Chip
