[Premium-Rx] WJ 8618 and 8617 Replacement Batteries

[stephous]

Interesting idea. Sure, you can use almost anything that will store energy as long as it has characteristics similar to the original device. 

1) Form: Radial leaded Ni-Cad 3.6V battery, 90 mAh, -20 to +85C operating
2) Fit: Physically compatible with original battery holder, similar length
3) Function: Low self discharge rate, no shelf life, low charge rate, same impedance

The other radios I own will all get new batteries. Some have cordless phone batteries jammed in. One has RC car batteries. One has a non rechargeable lithium cell, very wrong.

Note: The Cadnicas are epoxy sealed so they probably won't leak unless they explode. The original battery has a soft seal. The charging circuit does not provide enough current to explode the battery <20 mA (100 mW).

PCS Associates
949 Glenneyre Street
Laguna Beach, CA. 92651-2706
Phone: (949) 376-7844
FAX: (949) 376-7866
http://www.pcsassociates.net/
  ----- Original Message ----- 
  From: Ahmet G. 
  To: stephous ; premium-rx at ml.skirrow.org 
  Sent: Monday, August 14, 2006 3:42 PM
  Subject: Re: [Premium-Rx] WJ 8618 and 8617 Replacement Batteries


  Why not use a 1F supercap type capacitor. No leakage problems and works just like a battery. i used them in 8718 and RF590s and they work fine.  chose right voltage rating.  doesn't have to be exactly the same voltage, can use 5V Cap for most applications.
  regards, ahmet




    A suitable replacement for worn out CMOS back up batteries, WJ 8617 / 8618, all versions, BT1, p/n 180090-1:

    Replacement Part:
    Sanyo Cadnica N-SB3
    3.6V
    90 mAh
    -20C to +80C
    D = 15.5 mm
    L = 55.5 mm

    *Installation requires:
    1) Sleeve exterior with heat shrink tubing, WOER E203950 3/4", 125C
    2) Bend leads 90 degrees, trim, and solder wires in place
    3) Use original sleeves to cover soldered wire ends

    Source:
    http://www.batterystore.com/Sanyo/NSB3.htm

    Regards,
    Steve Pappin

    PCS Associates
    949 Glenneyre Street
    Laguna Beach, CA. 92651-2706
    Phone: (949) 376-7844
    FAX: (949) 376-7866
    http://www.pcsassociates.net/

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