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You guys realize that "lithium batteries" are about as specific as a "fuel driven car" right?!
Laptop batteries may be what comprises the building blocks to the battery pack in the Tesla roadster... But what makes it work in a EV with quite different demands than a laptop is the smart little chips surrounding it...
Trying to charge a pack of that many cells without BMS is asking for trouble... And charging separately is a PITA...
If you really can get them new for $4 you could probably spend the money to get the most basic BMS (or DIY one) and charge them as 12V/24V/48V blocks at least... Then you'd only need a few chargers or PS's to plug in... Still a hassle, but of a different magnitude...
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