Hi, I'm a 'newbie'.....but I've been a long-time 'lurker' on this forum, and I've learned a lot! Problem...my Sony power pack 'packed-up'.....I bought an adjustable voltage pack & adaptors last year & all was working well until now........I'm getting a 'low battery' message...but it won't charge. How can I tell if my battery is faulty...or the power unit is faulty? Also.....where can I buy a "dry battery case" for the Sony MZ-R35.....I can't find mine anywhere.....I should have 2......as this is the second R35 I've bought! Most of my work is done on JE-500....I should explain I often use this for 'backings' I create for public performance.........which I create on my PC & copy onto the MD. But the R-35 is a 'back up' & I'd hate to lose it. Thanks for any advice. Joe G.