Cell Phones Changing Social Group Communication
Mortimer.CA writes "An interesting article on how cell phones are changing the way people interact and get together in Japan. Some interesting quotations: 'To not have a keitai (cell phone) is to be walking blind, disconnected from just-in-time information on where and when you are in the social networks of time and place.' And the new social faux pas: 'One college student I spoke to described leaving one's phone at home or letting the battery die as "the new taboo."' The article mentions the book Smart Mobs which was mentioned on Slashdot before. I keep thinking how Marshal McLuhan said that our new inventions change the way we view the world. This is 'obvious' now, but was quite a new idea when he thought of it. In the 40s and 50s you "needed" to get a (land line) phone, then it was cars, email, and now cell phones. What's next? Is it simply a matter of keeping up with the Joneses?"
This is a common myth that's repeated like Gospel amongst people, but for good reasons. Allow me to elaborate:
The very earliest types of rechargable batteries, used on things like satellites, suffered from what is known as a 'memory' effect. In silly terms, it basically means that if you charge a half-full battery, it'll 'remember' where the charge started from, and only go on to do a half charge. When it reaches the halfway point, the battery 'thinks' it's empty. So you've just halved your battery life. Wash, rinse, repeat until the battery is useless.
When consumer rechargables started becoming common, early chargers (and a lot still do this today on NiCads) would keep applying current to the battery, even if it was fully charged. This 'overcharging' can seriously decimate the life of a battery - it renders useless the chemicals needed to drive the electric current.
So basically, people were overcharging their batteries left, right, and centre. Manufacturers started telling people not to continuously charge their devices, ie: leave the cordless phone off the hook for a while, things like that. Between noone explaining the principle of overcharging, and companies not fully understanding it themselves, we've moved on to 'completely drain any device before you charge it again'. Ironically this can actually lessen the life of many types of rechargables, including the new funky rechargable alkalines you see everywhere.
Anyway, the memory effect was only ever seen with batteries that never made it into consumer hands. But the myth lives on. There never was a reason for the drain-and-charge cycle. Overcharging was the problem all along.
Endless arguments over trivial contradictions in books written by ignorant savages to explain thunder in the dark.