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Laptop battery to charge cell phone or tablet Answered

I have a couple of L11S6Y01 Lenovo Lithium Ion batteries 10.8V nominal, 48WH, 4400mAH batteries and a couple of their AC adapters lying around the house.

I was looking up the Minty boost DIY battery back up and I was thinking of making this battery back up kit to recharge my iPhone and Samsung tablets, both of which can connect to USB power sources.

My idea:

1) Get a 7 pin connector that will connect directly to my AC adapter.
For example: http://www.ebay.com/itm/External-Laptop-Battery-Charger-for-Lenovo-IdeaPad-B570-G470-G570-Z570-L09L6Y02-/121091427052?pt=Laptop_Batteries&hash=item1c319c8aec

Maybe I can scavenge one such connector from this place:  http://www.ebay.com/itm/IBM-X60S-Battery-Connector-/350772373819?pt=UK_Computing_Other_Computing_Networking&hash=item51aba9a93b

2) Build a circuit similar to Minty boost : http://www.ladyada.net/make/mintyboost/icharge.html

Except in this case, my source is a Li Ion rechargeable battery instead of 2 AA batteries.

Any ideas and thoughts would be appreciated.






7805 voltage regulator takes up to 35v and drops it to 5v DC.