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Topic: FYI: Why not to use 9V batteries for servos and motors. (Read 415 times) previous topic - next topic

MarkT

I found this excellent page with discharge curves for 9V PP3 batteries at
various discharge currents - since motors and servos often take 1A or more
its very clear why they are not the correct way to power motors!

http://www.powerstream.com/9V-Alkaline-tests.htm

Note that at all the currents used the batteries gave no more than 5--7V - if you want 9V
limit to <30mA or so as they are designed for
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

eXXonWaldez

Yeah, even when powering my 128x64 lcd, 4xAA batteries they dies in approx 30 minutes.

Nice work by the way.

Regards.

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