charge voltage [RE-wrenches]

[Richard Perez, Home Power magazine]

<x-flowed>Hello S

You are correct and my math is faulty. C/20 for a 500 mA-hr cells is 
indeed 25 mA.

C/20 is a float rate--as in float 24 hours per day for days at a 
time. Most alkaline cells can be recharged at the C/10 rate for 24 
hours without damage.

Where you don't want to space them out is at recharge rates of C/3 
and faster. Leaving the cells on too long at these high currents will 
overheat the cells and cause them to vent. Venting will cause the 
cells to dry our and fail in short order.

Richard

>	Richard;
>
>	I am loath to question the Battery Miester, but your reply 
>seems to have a
>conflict. Wouldn't a C20 rate for a 500 mAh battery be 25 mA? Or did you
>mean C10. Not just being a stickler for details, but wanting to know, as I
>use the 'pulsar' circuit to charge all my NiCd's and sometimes leave them
>on a little longer than I expect to.
>
>	-S

------------------------------------
Richard Pérez
Home Power
PO Box 520, Ashland, OR 97520  USA
Tele: 530-475-3179
FAX: 530-475-0836
Subscriptions: 800-707-6585
mailto:richard.perez at homepower.com
Web: http://www.homepower.com

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