[Premium-Rx] WJ 8618 and 8617 Replacement Batteries

[Tom M.]

I tried a large capacitor and it would not hold for a day.

I ended up wiring in a twin AA holder and Velcro'd it to a nearby bulkhead,
used regular NICAD AA's, worked great and easy to swap if they go bad.
Tom N5OFF



--- stephous <stephous at att.net> wrote:

> 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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