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shdesigns
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join:2000-12-01
Stone Mountain, GA
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reply to public

Re: effect of high charging current on NiMHs

Yes, i do AA's at 750ma regardless of capacity. That is enough to peak charge. If I'm in a hurry i use 1.25A, again the 0.5C level.

I have seen 3000mah A cells charged at 10 amps. Then again they are designed for it and are discharged at 25+ amps.

public

join:2002-01-19
Santa Clara, CA
said by shdesigns:

I have seen 3000mah A cells charged at 10 amps. Then again they are designed for it and are discharged at 25+ amps.

Typical nimh aa cell will run hot when loaded at 1A. Which AA cells can supply 25A?


shdesigns
Powered By Infinite Improbabilty Drive
Premium
join:2000-12-01
Stone Mountain, GA
Reviews:
·EarthLink
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·Atlantic Nexus
said by public:

said by shdesigns:

I have seen 3000mah A cells charged at 10 amps. Then again they are designed for it and are discharged at 25+ amps.

Typical nimh aa cell will run hot when loaded at 1A. Which AA cells can supply 25A?

I did not say AA, I said A cells (often 5/4 A). Yes, they get hot enough when discharged you cant hold them in your hands very long. I remember they were Sanyo. Used in R/C plane, flight time of 6 to 8 minutes.
--
Scott Henion

Embedded Systems Consultant,
SHDesigns home - DIY Welder