Just keep a trickle charger on it and you'll be fine.

 

30ish degrees here and my battery (Odyssey PC680T) is working very well. No problems whatsoever with cranking.

Kyle Ritchie

 

30 ish is fine. Below 20 degrees the Odyssey really doesn't have enough cranking power. Get down below 10 and the car won't even start unless there's a charger on it or it's warm already.

Tim

 

That's going to be a problem for me. I wonder if the BuddyClub is the same?

 

hmmm, Odyssey's website says otherwise. I'll let you guys know how it cranks in below 20 degress F.

Kyle Ritchie

 

I just read enough stories from the RX7 forum from people who have used the 680 to figure out that it sucks in cold weather. Im wondering if the buddy club is any better. If not I guess Ill be relocating to the trunk.

Are there any good spots to route a 2 gauge wire back there? Any good grounding spots?

 

It has been pretty cold here in NY for about the past month or so with 20-40 degree temperatures everday. I keep my car in the garage, but it is still frozen in there, as well as my car is outside all day when I have class and the buddy club has been working like a champ. I haven't had any problems with starting the car with it, but i'll keep you guys posted as it keeps getting colder here.

 

Alright, I got the specs from BuddyClub: How do they compare to the Hawker?

Nominal Voltage
12V

Nominal Capacity
20-hour rate (1.1A to 10.50V) 22Ah
10-hour rate (2.2A to 10.50V) 22Ah
1C (22A to 9.60V) 9.9Ah
3C (66A to 9.60V) 7.92Ah

Weight
6.55kg

Maximum Discharge Current for 30s
440A

Maximum Discharge Current for 5s
880A

Operating Temperature Range
Charge 0 (32) to 40 (104)
Discharge -15 (5) to 50 (122)
Storage -15 (5) to 40 (104)

Charge Retention (Shelf Life) at 20 (68)
1 month 92%
3 month 90%
6 month 80%

Charging Methods at 25 (77)
Cycle use:
Charging voltage 14.4V to 15.0V
Maximum charging current 6.6A
Standby use:
Float charging voltage 13.5V to 13.8V

Life Expectancy
Cycle use:
100% depth of discharge 200 cycles
80% depth of discharge 225 cycles
50% depth of discharge 500 cycles
Standby use 3-5 years