MAKE:Blog has posted a link to a new How To.  In this case it’s a step by step set of instructions on how to refill a laptop batteries.  It can also be used to mod your battery, by using more powerful cells, you can get a battery that last longer than the original did.  Make sure you read all the warnings, otherwise you or your laptop may end up quite sad.
“Here’s a step by step tutorial on how to “refill” laptop batteries by replacing the Li-Ion cells. By purchasing higher capacity cells than your laptop uses normally, you can super-charge your battery life!”

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