By Soulskill from
Slashdot's guilty-as-charged department:
An anonymous reader writes:
Last week we discussed news about the "Batteriser," a small device that fits around a battery and extends its lifetime. Many of us were skeptical, particularly with the claim that it could extend battery life up to 8x. Now, David L. Jones at the EEVBlog explains exactly why the device won't be as good as its creators claim. The technology itself, he says, does actually work at extending battery life, and has existed for a long time. What this company seems to have done is just shrink it down to a more useful size. Unfortunately, their claims about when a battery stop working and how much energy is left don't really hold up. Batteroo, the company making the Batteriser, claims products stop working when a battery's voltage drops below 1.3v, but a simple test of common household gadgets finds that to be untrue. Further, the percentage of energy left in the battery after this cutoff can vary wildly. Sometimes it will be 80%, but most of the time it won't, and it's frequently 20% or lower for Alkaline batteries. Jones writes, "I'm genuinely baffled as to why Batteroo would need to resort to claims like 8 times life. This thing would still sell like hot cakes if they claimed realistic practical figures. 50% increase in your battery life? – great, countless people would still buy it at the super low price point it's at."Read Replies (0)
By samzenpus from
Slashdot's music-will-find-a-way department:
An anonymous reader writes:
Operating as personal offline versions of iTunes and Spotify, the téléchargeurs, or downloaders, of Mali are filling the online music void for many in the country. For less than a dime a song, a téléchargeur will transfer playlists to memory cards or directly onto cellphones. Even though there are 120,000 landlines for 15 million people in Mali, there are enough cellphones in service for every person in the country. The spread of cell phones and the music-sharing network that has followed is the subject of this New York Times piece. From the article: "They know what their regulars might like, from the latest Jay Z album to the obscurest songs of Malian music pioneers like Ali Farka Touré. Savvy musicians take their new material to Fankélé Diarra Street and press the téléchargeurs to give it a listen and recommend it to their customers....This was the scene Christopher Kirkley found in 2009. A musicologist, he traveled to Mali hoping to record the haunting desert blues he loved. But every time he asked people to perform a favorite folk song or ballad, they pulled out their cellphones to play it for him; every time he set up his gear to capture a live performance, he says, 'five other kids will be holding their cellphones recording the same thing — as an archivist, it kind of takes you down a couple of notches.'”Read Replies (0)