REPLACEMENT OF THE MEMORY BATTERY ON THE BOARD FOR YOUR AIWA JX909
STEREO RADIO PLAYER. THIS MEMORY BATTERY KEEPS THE LOGIC BOARD ACTIVE WHILE THE PRIMARY BATTERIES ARE BEING REPLACED. THE AIWA BOARD WILL BE THE SOURCE OF CHARGE THE BATTERY WILL OBTAIN, AND WILL RECHARGE IT UP TO IT'S 3 VOLT LEVEL. YOU NEED NOT TRY TO CHARGE THE BATTERY, AND IF SO, THEN YOU NEED TO HAVE A TRICKLE CHARGER THAT WOULD PREVENT THE BATTERY FROM BEING BURST.

THE CMOS BATTERY FOR THIS MODEL REQUIRES A SMALL COIN CELL BATTERY WITH HORIZONTAL SOLDER TABS PERPENDICULAR TO EACH OTHER ALLOWING THE SMT BATTERY TO BE SOLDERED TO THE LOGIC BOARD, TO IT'S PRINTED CIRCUIT LAYOUT. THE SOLDER TABS WILL REQUIRE SOLDERING TO THE PADS FOR BOTH NEGATIVE AN POSITIVE POLARITIES. THE BATTERY WILL HAVE THE POSITIVE POLARITY (+) DEMARCATION FOR CORRECT POLARITY ORIENTATION TO THE MOTHERBOARD. USAGE OF A VOLTMETER WOULD AID THE ELECTRONIC TECHNICIAN/OR EQUIVALENT, TO UNDERTAKE THE TASK FOR REPLACEMENT. THE BATTERY MEASURES 3 VOLTS.