Dr.med.Lecter

I'm using the bundled RB-M02 E charger by AIWA which is only suitable for the shipped Aiwa rechargeable battery. There's no indicator on the unit, the manual tells to charge an empty battery for 8 hours. Now i want to charge a SONY battery (NH-14WM(A)) of same type and capacity but i'm afraid of damaging something. Is there a µ-processor controlled mechanism in such kind of chargers? Output current on my AIWA RB-M02 E is 250 mA, the battery's capacity is 1400 mAh. Does anybody know, how chargers for such (prism-shaped) battery types work? Why does the manual tell not to use it for another (equivalent) battery? Thanks in advance Dr.med.Lecter

hi all, this is my first post here, search didn't help. i purchased a sony mz-r700 4 years ago and for 3 years it did work fine. 10 months ago the phones out jacket seemed to get a loose contact. both channels are cancelled now, by pressing the phones plug very hard at the side sometimes the sound comes back. this became steadiliy harder as time went by. some weeks ago i opened the unit and checked out that there ist no problem with the jack itself but with the amp. because every time both channels are cancelled, i presumed a problem with ground pin. no way, the jack is having ground shurely as well as the left and right pin. can anyone help? sony service is too expensive for this old unit and would take too long. thanks in advance dr.med.lecter (from germany)