Hi, An unfortunate and stupid thing happened to me while changing a battery for my MZ-RH10. The bloody lid just broke loose and one of those plastic strips that hold the lid on it's place fell out too. I sent a user support request for Sony to send me a replacement part (X-2055-437-1 - thanks for providing the service manual, minidisc.org ) - don't know whether the part is available or not. Anyway, be careful when you open the battery lid on a MZ-RH10, it seems to be pretty fragile thing...