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Help.
do i need a new laptop battery?
had laptop two years and unless i leave power cord plugged in the battery dies after only 25 - 30 minutes.
i can charge the battery to full and it still only last that long.
Someone told me (Hauser) that if you are using your laptop when the power is connected you should unplug the battery as it is being constantly charged and they only have the capacity to be charged so many times.
So if this theory is correct then, yes you need a new battery.
Hauser must buy shite then - any laptop worth its salt will let you control whether charging occurs when on mains power.
Actually the battery isn't being continuously charged anyway. On mains you're getting power straight from the power supply. The battery will also get some if it needs charging.
The problem then is that lithium ion cells don't like being stored when fully charged, which is effectively what you're doing when it reaches full charge. You should always store them half charged.
So, if you use your laptop mainly on AC power, and it doesn't have the option mentioned above, it's a good idea to run the battery down to half charge, and then either:
1) take it out, or
2) swap it with an older one.
OP: if you get a new one, keep your old one and use it per 2) above. It'll hold some charge for ages yet, which gives you a UPS for your laptop and some protection if your lass trips over the power cord and pulls it out. Though not from your lass obviously.
You have to charge it then use it to empty then charge it again. Lithium(sp) batterys if fed off a charge will become lazy
not really lazy as such, but if you keep charging them up when they're not fully drained they suffer from Memory Effect which lowers the amp hours available
Doesn't apply to lithium ion batteries.
You're right about storage as well. Approx half charge is ideal storage conditions.
Power supplies compare the battery voltage with the charging input. Charging is controlled automatically, as the voltage rises to the point of being fully charged the circuit cuts off charging from the mains, it's the same in any charging ciruit these days. It doesn't matter if the mains lead is plugged in or not.
I have a Toshiba Satellite and I have noticed that I have suddenly started to get just over and hour from a fully charged battery, it's three years old, so it's getting near it's time. I also have a friend whose battery was suspected, I found that the charger was working intermittently, a broken wire on the 19 volt side (there are only two wires in this lead, the one in the centre, and the one that is also the screen around the outside) easy to fix if you're carefull.