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Spockie-Tech
Site Admin
Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia
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Sorry, I meant impedance (which is only frequency sensitive resistance anyway).
AFAIK, most batteries spec the 1Khz impedance, since its usually directly related to the DC resistance and its hard to measure the DC resistance of a cell that will put out 100's of amps if you short it..
The sanyo RC3600's spec'd here
http://www.master-instruments.com.au/Data%20Sheets/Hobby/Sanyo%20RC-3600HV.pdf
show an impedance of <4 milliohms at 1Khz
The Powerstream GH2500 spec'd here (the closest ones they list data for)
http://www.powerstream.com/p/GH-Sc2500P.pdf
show an impedance of <10 milliohms at 1Khz (more than twice as high).
I dont think a 1/2D's peak currents can be fairly compared to a sub-C's peak current.
Also for comparison, the price of $3.21 is in US$ ($4.60 Aus), and you have to pay shipping from china with a delivery time of 3-6 weeks, plus GST (and duty if applicable) when it gets here, plus minimum order of $200 (~60 cells) for a 3000mAh cell.
The Master Instruments quote you got of $7.80 (for 100) for the lower impedance sanyo cells is is Australian $ for a 3600 mAh cell (600mAh more), is local here in Australia (low shipping) and is available now ex-stock (not sure about GST though).
Put that way, the Sanyo's dont seem so pricey. I'm not being pedantic (I hope just making sure we comapre apples with apples, not just price) _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
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Wed Sep 01, 2004 10:04 pm |
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