hi, i live in the US, and i've recently purchased a UK version of the sony mr-r909, and have a couple of questions. battery: if i need to replace the included rechargeable nimh(nh-14wm(a)), which brand should i buy and where? ac adapter: the adapter is a three prong UK version 3V ac-es305 230-240v 5w. i need a US version, what should i buy and where should i shop? many thanks