Who's right and who's wrong as far as battery is concerned??

There are so many different viewpoints when it comes to taking care of the Mac battery. I just read that "Apple does not recommend leaving your portable plugged in all the time."
How come so many of you go against Apple's recommendation and think it's best to keep it plugged in all the time whenever possible? I'm very confused about how to take care of the battery.

Kappy wrote:
I'm sure in many cases what you say is true. But the "memory" effect has been pretty well documented elsewhere.
Nickel-cadmium does not like to be pampered by sitting in chargers for days and being used only occasionally for brief periods. A periodic full discharge is so important that, if omitted, large crystals will form on the cell plates (also referred to as memory) and the nickel-cadmium will gradually lose its performance.
See also This page.
This is intended for clarification, not criticism.
I understand there are some serious limitations to NiCad - not the least which is cadmium toxicity. Still - there is no better battery chemistry for things like power tools, where the super-low internal resistance means far better efficiency with high drain devices.
I just recall that a lot of the calls to fully cycle NiCads on every opportunity might have been misplaced. Batteries simply lose capacity over time, and a good many people saw their gradual loss of capacity as a sign that they were suffering from "the memory effect". Even so, I have a AA/AAA battery charger with a so-called "conditioning" feature which drains the battery down until it reads 1V and then cycles. The manufacturer recommended this step every time for NiCads and once every 10 charges for NiMH. I also have one of their chargers with a "flex pulse" charge algorithm which they claim makes conditioning unnecessary by eliminating crystal formation. I once tried measuring voltage on a charging cell, and it was constantly varying the voltage as it charged.
However - I'm not sure how critical deep cycling is for ultimate longevity. The ideal situation for battery longevity is to only make use of the center of the charge range - what hybrid car owners call the "Sweet Spot". Something like a Toyota Prius tries to keep the battery range between 40-75% and can go through hundreds of thousands of these smaller cycles, when a traditional cell (using more of the charge range) is rated for 500-1000 cycles.

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