Re: Battery Condition Test - how can I tell if the battery I bought is good ?
- From: "Luhan" <luhanis@xxxxxxxxx>
- Date: 29 Apr 2006 12:39:39 -0700
Vadim Bishtein wrote:
I bought a 9V Lithium cell primary battery (single use battery, not Li-Ion
rechargable like in cellphones).
I suspect it might be old or not in good condition. To test it I hooked it
to 500 Ohm resistor and measured
the output voltage:
No Load Vout = 9.8V
Loaded Vout = 9.5V and reading drops
by ~10mV every 2sec
After the first test the battery reading changed again:
No Load Vout = 9.55V
Loaded Vout = 9.29 and reading drops
by ~10mV every 2sec
Is this a normal behavior for battery of this type ?
Looks like a 'surface charge' to me. Nomimal for Lithium is 3.0 volts
per cell; thats 9.0 volts for your battery. Try 100 ohms/1watt
resistor for a minute or so. You should still see about 9 volts after
that. Does the battery have a stated mah rating?
Luhan Monat (luhanxmonat-at-yahoo^dot^com)
http://members.cox.net/berniekm/
"Reality: what a concept!"
.
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- From: Vadim Bishtein
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