What brand of AA barrage gives you the most power for your one dollar bill ?
Software developer Denis Hennessyapproached this questionkinda like the price - per - pound approach he employ when purchase grocery . With barrage , he looked at cost per watt - minute .
Hennessy bought a cluster of AA cells , and test them on a homemade tour build from an Arduino controller and an LCD proctor . The apparatus absorb a full burster out of each stamp battery , one at a prison term , using a specify resistive load . As the battery drain , the LCD give a second - by - moment exhibit of voltage and the amount of Energy Department give , in Joules and W - hours . Once the charge drop below 0.2V , the circuit give up log and designate the entire amount of energy the battery had produced . As each battery bleed out , he compared its cost and performance to compute a price per watt - hr .
Hennessy try out out various recognizable brands — Duracell , Panasonic , and Energizer — each with topnotch - charged names such as “ radical , ” “ plus power , ” and “ industrial . ” He found that those alluring adjectives do n’t really mean much . The best time value AAs come from RS Power Ultra , which was more than nine times better than the worst , the Panasonic Evolta .
Now , this mental test took topographic point in the EU , so you ca n’t in reality get the RS Power Ultra here in the United States Department of State . you could , however , recreate Hennessy ’s test , because he ’s post the source codification , excogitation , and result data file onGitHub . [ Dennis HennessyviaHackaDay ]
Image course credit : Piotr Zacj / Shutterstock
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