VidPro
Flashlight Enthusiast
So one more quick question...
I'm discharging a fully charged 18650 Ultrafire. What I want to know is the capacity vs the claimed capacity. I am discharging at 1A. How do I calculate the capacity? My charger has a timer on it, as well as voltage (started at 4.17V and will terminate at 3.00V) and a climbing number which I assume is mah. Is this correct for determining capacity or do I need to do math?
Thanks guys
Its close enough for comparison. if your trying to determine the Capacity , The number you read when DISCHARGING is what the battery held. The number shown when charging is what was sent towards the batterys general direction, and does not mean it held that power.
if you want to compare to what the overrated manufacture did, then you gotta go solid full 4.2V , and drop it as low as 2.6V (say) but they dont like to be so low. then what RATE of discharge is important too.
EX: say you have a 2400UF thing , to try and get close to thier rating, charge it fully 4.2 (4.25 even) , discharge it slowly all the way to a very low cut-off.
When you see other charts and graphs, and discharge specs on forums and stuff, you just apply thier SAME methodology to compare to thier testing. everyone tests a bit different, It is the SPECS of thier testing that is important for comparison.
the only real way to compare to a manufactures specs for SURE , is to read exactally HOW the manufacter aquired that fantasy capacity, and look at what THEY do in thier spec sheet , and follow it exactally the same. Sure there is standards, but the spec sheet that shows capacity also attempts to show the testing parmeters.
3.0 is a good place to stop, treat battery well, what is left is little and depends on the battery, and battery resistance ETC. so no real problem exists.
The capacity YOU will get out of any battery is all that maters right? so YOUR test, should attempt to simulate YOUR use and charging patterns, YOUR parameters are what you will have when using it.
if you want to display your testing, simple JUST provide the parameters you used when you show results of the test. We get that
charge level was ???
discharge rate was ???
Device used was ???
Stop discharge at ???
, i get ??? capacity.
Is lots of information.
Tested got ??? capacity is NO information
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