T42 first battery charging

T4x series specific matters only
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mrflynn
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T42 first battery charging

#1 Post by mrflynn » Mon Jun 28, 2004 3:31 am

Hi folks,

I got my 2373-3UU just yesterday and I am wondering how long I should charge my battery in the first times. I know that cell phone batteries should be charged at least 24h the first time and then let it discharge completely and recharge again.
What strategy do you suggest to maximize the life of ibm t42 batteris???
When I am at home and I plug the laptop into AC and my battery is full charged, should I have to remove the battery from its slot???
And last question :-) how long should it last a ibm t42 6-cell battery while I am just surfing the web and writing some e-mails???

Thanks in advance
Tony

K. Eng
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Re: T42 first battery charging

#2 Post by K. Eng » Mon Jun 28, 2004 7:23 am

I don't think there is a specific amount of time that you should charge the batteries. Charge them until the Battery Maximizer gauge reads 100%. The battery is "intelligent" and will stop charging when it reaches full capacity.

To extend battery life, try to avoid discharging below 10%, and never drain the battery all the way to 0%. Lithium Ion batteries can be damaged if they are fully discharged. For example, I lost 4 watt/hours of capacity when I discharged to 1% :(
mrflynn wrote:Hi folks,
I am wondering how long I should charge my battery in the first times.
...
What strategy do you suggest to maximize the life of ibm t42 batteris???
No, you don't have to remove the battery from its slot when it is full. You don't have to worry about overcharging the battery because it knows when to stop charging.
mrflynn wrote: When I am at home and I plug the laptop into AC and my battery is full charged, should I have to remove the battery from its slot???

I would guess about 4 hours if you turn the screen brightness down a bit.
mrflynn wrote: And last question :-) how long should it last a ibm t42 6-cell battery while I am just surfing the web and writing some e-mails???
Homebuilt PC: AMD Athlon XP (Barton) @ 1.47 GHz; nForce2 Ultra; 1GB RAM; 80GB HDD @ 7200RPM; ATI Radeon 9600; Integrated everything else!

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