Quite shocking that in a major american city the power would fail so much, but it does. Many of the retail emergency solutions flat out suck. The market is flooded by dyno powered lights sporting Li-on buttons cells. After two incidents and much hand cranking, this nonsense has to go. The plan: 6v lead acid battery(ies) - Cheaply found in go-karts Led lights - 4/8 10K MCD lights. Battery charger with overcharge protection. Inspired by this video http://youtube.com/watch?v=hsWFUfFZIsQ However using much beefier batteries. Why ni-cad? Anyway... Originally I considered the MN-918 Alkaline battery. It's basically a doubled up 6v spring cell. 30,000 mah of power. $13 each. Very cheap. However, there is a 6v lead acid rechargeable for the same price. However it is only 12,000mah. But it is reusable. The charger for the 6v battery would be around $7-20. I would prefer the more deluxe model with overcharge protection. However if someone knows what IC they use in them it would be nice to make my own. For lighting I was considering something like this: http://cgi.ebay.com/8-White-LED-Modules-6V-12VDC-power-POWER-SAVING_W0QQitemZ200235379996QQihZ010QQcategoryZ20706QQssPageNameZWDVWQQrdZ1QQcmdZViewItem The seller has been nice enough to provide the schematic for his product.... I would use four modules, so that would be About 12 hours light on the lead acid as it will probably heat up and combust below 20% charge. The alkaline would give a staggering 30+ hours of strong light before it starts diminishing. I was thinking this would nicely fit into a broken xbox or something. I thought about 12v but at that size I might as well just get a generator. Feedback is valued.