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I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I am a long-time contributor to MAKE magazine and makezine.com. My work has also appeared in ReadyMade, c't – Magazin für Computertechnik, and The Wall Street Journal.

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@seanragan

April 27th, 2011 2

A commenter on last week’s electric bike round-up pointed me to this drool-inducing 2008 build from one “Doctorbass,” of Quebec. I am especially impressed by the custom-built battery pack:

432 Sony 18650V (known as Konion).used in Makita, Bionx an, 3.75 Volt, Lithium-Ion
2.21 Kilowatt-hour LiMnO2

I built this pack myself with engineering knowledge for thermal management and safety protections.

I used many used 18V 3Ah LXT power tools battery pack of Makita.

These cells are 1600mAh each and are mounted in 24s 18p groups.

The total pack give 100.8V fully charged and 24Ah.