Hi Harry -
"The battery isn't user replaceable; you have to send it back to Sony to have it replaced."
But my whole gripe is - apart from the obvious aim of ripping us off - especially outside warranty, why shouldn't you be able to DIY ?
Is the thing designed to be destroyed if you don't wear a Sony overall ?
From all accounts, the cost of replacing a battery is ridiculous, when I'm sure a decent blow by blow account, with pics/diagrams, would be feasible.
I'm sure someone did just that, possibly Youtube.
It smacks of cars who design components that can only be fitted with a very specialized tool that only a garage might afford.
And I know there's always someone who finds a way around that one !
( Here in the UK, Haynes make a lot of money doing just that with every car on the market. )