powerbook battery replacement/upgrade?

[qtip919]

Hi,

I noticed that the new powerbooks have batteries with longer batttery life. Is it possible to use these new batteries in older Al powerbooks?

I have a 1.5ghz AL powerbook purchase last summer and was hoping for more battery life

 

[caveman_uk]

Hi,

I noticed that the new powerbooks have batteries with longer batttery life. Is it possible to use these new batteries in older Al powerbooks?

I have a 1.5ghz AL powerbook purchase last summer and was hoping for more battery life

The batteries are the same. The extra battery life comes from the laptop itslef being more energy efficient. Specifically the processor can now step down to 1/4 of max speed as well as 1/2 (which is what it did before). This lower clockspeed and concomitant lower voltage allows the battery to last longer.

Also the RAM is marginally more energy efficient.