[ltp] Thinkpad battery exhausted in less than a year?

[James Knott]

Eben King wrote:
> On Mon, 15 Nov 2004, Patrick Huber wrote:
> 
> 
>>Don't forget to consider this too:
>>10.8V * 4Ah = 43.2Wh
>>14.4V * 1.7Ah = 24.48Wh
>>
>>So the 14V battery will only give half as much battery-time as the 10V battery 
>>would.
> 
> 
> Doesn't that depend on how the conversion from (the voltage the battery 
> supplies) to (the voltage the computer uses) is done, or is there only one 
> way?  Half as much energy I can see.
> 

Modern power supplies are fairly efficient.  It's the total enery 
available, that determines how long a battery lasts.  As long as the 
computer power supply is designed to handle the different voltages, 
there shouldn't be any issues there.