In a message dated 6/29/2005 2:57:02 PM Eastern Standard Time, toujc at tlb.sympatico.ca writes: Hi, Are the battery in a duo 280c and the one in a duo 2300c the same? What I really need to know is if the batt. are interchangeable from one computer to the other (even if they have not the same capacity)? Thanks, JCT Yup...there are three Apple Duo batteries. The type I is really only useable in the 210/230 due to limited capacity....it uses AA cells inside and is easily rebuildable. The Type II and Type III use the 4/5th's "A" cells and are a bit tougher to rebuild. All will work in any Duo unit, at least thru my collection (230s, 270, 280 & 2300s). ----snip----- Cheers! Andrew -------------------- Thanks for answering Andrew. Much appreciated. I am on digest mode however, this is why I am so late in answering. I just receive the digest with your answer today 7/20/2005 :-( JCT