How long would a battery power a G3 without AC current helping? Is there a difference between aftermarket and the original one. I didnt plug my IBM in last night it seems and it didn't last long before the battery ran down. Maybe 40 or 50 minutes. A new but low priced made in China maybe. I think it was fully charged when I started. Does Macintosh have cheap, not so good imitations? If you are inclined to email me for some reason, remove NOPSAM :-)