I ended up waking up at 6:30am today with him, because he had to catch a flight. Meanwhile, I left for school with my battery tender in hand, hoping to get my motorcycle charged up quickly. I tore down the bike, pulled the battery, and linked it to the battery tender to be charged. Today was supposed to be a warm day, in the 40'sF, so I wanted to get in a good ride in the afternoon. 3 hours later, I check the power light, and notice that it's still charging. Dang. The voltmeter showed only 6V, with 12V being fully charged. After further research online and some calculations, I realized that it can take a long time to fully charge a motorcycle battery. Specifically, 18 hours using the combination of my battery tender and battery. Crap.
I'm now in motorcycle withdrawal mode. I have to take the subway back home tonight, and tomorrow morning. At least now I know, it takes a long time to charge a motorcycle battery.
Edit: It ended up taking 3-4 days for my battery to fully charge to 12.6V, using a 750mA battery tender. Afterwards, from researching online, people told me that battery tenders are not built for fully charging a battery, hence the long recharging times. Also, jump starting my motorcycle battery with a car engine was NOT RECOMMENDED. Something about likely destroying the puny motorcycle battery with too much current.
-Howitzer
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