Need help

If my crossfire sits for more then a couple of hours it wont start

Went out to go to work and my car had a dead battery. When you turn the the key it will click,but will not turn over. I got a jump start and drove to work fine. When I left work same problem. I took it to Autozone were I bought the battery to have it checked out. The Tech hook it up and everything checked out fine.

Voltage: 12.8
Cranking Amps : 688
Battery rated At:770

Starter Test: Results "No Problem" Cranking Normal
Voltage:11.06v
Amps;223.9A
Time: 953ms

Charging Test: Results "No Problems"
No Load: 13.23v/8.3a
Loaded: 14.13v/3.8a

Drain Test: Results Passed
0.58a

Went home and went to bed , went to go to work and same problem. I hooked it up to my Battery Jumper/Charger to jumped car and it started right up. I took the Charger to work and let it charges the whole 8 hours at work. The charger display said it was 75% charged when I hooked it up and after the 8 hours said 100% charged. I unhooked it and went to start car and same problem / clicking but no turn over. I hooked the charger back up and put it in jump mode and let it set for a minute and the car started right up. Anybody have any idea what going on or what might be the problem

Thanks For any help
Sive