FWIW, there's no need to hook the battery up to a charger if it's not hooked up to the vehicle. Mine's just been sitting in the garage for nearly a year now until I have a chance to figure out the starter and horn issue (electrical drain) I'm having. Battery test full charge a few weeks ago.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed | |