Ac Adapter after 100% charge

[Jarhead]

Well if you use your laptop on battery a lot that would be the reason the battery is depleted, not because it is plugged in all the time. Your battery loses maximum charge with every discharge/recharge cycle. Something like 500 before the battery is more or less dead.

That might be it. I regularly take it to/from school and afterschool meetings without the charger. Eh, I looking to buy a new laptop soon anyway, so it doesn't worry me much. I'll pass my Toshiba down to my bother to use as an internet acees point or something.

[__-_-_-__]

it won't overcharge but it will "recharge". what it happens is that when capacity reaches 100% the battery stops charging. Then the capacity will drop very slowly to about 95% and then it will charge again to 100%. the process of always keep re charging the battery deeply impacts the battery performance over time. But there are also other factors like temperature etc.
If you plan on using the battery just charge it to 100% and remove it. if you don't plan using the battery anytime soon charge it too 40% and keep it in a cold and dry place.
Usually I keep my batteries (not only notebook ones) inside a sealed compartement that I store in my fridge. Just don't put them in the freezer (temps below 0ºC kill li-ion batteries completely).

[HTWingNut]

it won't overcharge but it will "recharge". what it happens is that when capacity reaches 100% the battery stops charging. Then the capacity will drop very slowly to about 95% and then it will charge again to 100%. the process of always keep re charging the battery deeply impacts the battery performance over time. But there are also other factors like temperature etc.
If you plan on using the battery just charge it to 100% and remove it. if you don't plan using the battery anytime soon charge it too 40% and keep it in a cold and dry place.
Usually I keep my batteries (not only notebook ones) inside a sealed compartement that I store in my fridge. Just don't put them in the freezer (temps below 0ºC kill li-ion batteries completely).

That slight recharge will NOT deeply impact the battery performance. A battery that is being unused can take weeks to discharge 5% on its own sitting in a laptop, unless there's a short or something.

Battery discharge/recharge cycles are quite linear too, so a 5% discharge and recharge 20 times is pretty much the same as a single full discharge / recharge. If you never remove your battery, as long as the battery and charging logic are reasonable, you shouldn't lose more than a few percent battery life over the course of a year. It will get worse over time, but a battery that never leaves the laptop and plugged in more or less 100% of the time will not lose more than 10% over the course of two years, usually it's a lot less than that.

All the talk about batteries and their discharge are wive's tales left over from years and years ago. No longer an issue. In any case, if you DO use your battery regularly, which is the point of a laptop, you should still expect to use it on a nearly daily basis for two years before it loses significant charge.

So many laptops these days are moving the batteries internal, because that issue is not as significant as it used to be.