765T Battery Charge Time

 

I'm sure this may have been asked somewhere in the past but couldn't find it. Just wondering if there was a chart regarding charge times for the 765T (AC vs. USB). I don't have an official Garmin AC adaptor but I put it in the cradle and plug the cigarette lighter into a AC/DC converter. Seems to be quicker than USB. Now I'm wondering if I can use my Blackberry AC adaptor with it since it has the same standard mini-USB plug but not sure how many amps is required for a quick charge.

Anyway, if anybody knows a good reference for this as the manual has nothing on it, please let me know.

Thanks.

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Garmin: GPSIII / StreetPilot / StreetPilot Color Map / StreetPilot III / StreetPilot 2610 / GPSMAP 60CSx / Nuvi 770 / Nuvi 765T / Nuvi 3490LMT / Drivesmart 55 / GPSMAP 66st * Pioneer: AVIC-80 / N3 / X950BH / W8600NEX