Hi...my laptop Acer Travelmate 2300 (2303NLCi) only can last for 1hour...its 2004 laptop...and my laptop been using ac power since it bought...rarely use the battery

this is my battery spec
Manufacturer : SANYO
Device Name: 05ZL
Designed Capacity: 32560 mWh
Wear Level: 60%
Voltage: 16829mV
Type : Lithium Ion
Manufacture Date: 2004/10/29

so will u suggest me to refiled battery?or is this still the normal rate for normal battery?...if i refiled it,how long will it last?

can it be upgrade the capacity for my battery? if it can last for 3 hours it would be good