Re: Ultimate AA battery shoot out
David,
Since there is an accepted industry and engineering standard, the IEC standard, why not use that STANDARD to do your testing if you want it to be the 'ultimate' shoot out?
You seem to have arbitrarily picked charge and discharge currents and you're not following the standard, from what I can see, with break in cycles and resting.
cause i prefer to use more heavy tests, that can help more who do a heavy use of batteries, like us of CPF that load batts at 4-5A, use several batts in series, use fast chargers etc. my test will se also how batts will degrade with different uses, like charge at 5A instead of 1.5A, overdischarge vs. partial discharge, discharge at 4A instead of 1A or 400mA
Can you explain what the figures mean?
For example, for the Duracell Precharged (China), the first four green columns display data for the first of four cells tested. The top left corner is as follows:
D. 1A [start-1.1V-0.8V-average] 1.30 1160 1290 1.18
C. 200mA [start-peak-mAh] 1.255 1.476 2550 ----
Okay, I am starting to understand most of it. They key is at the left (doh!). It looks like the second row is the start and peak Voltage followed by the mAh. The first row is the start voltage, unknown, unknown, and the average voltage.
It looks very interesting and potentially useful.
yeah i need to do some FAQ, there are a huge quantity of datas that i try to concentrate in a little spreadsheet
D. 24h 1A [start-1.1V-0.8V-average]
this mean: Discharge after 24 hours from the charge at 1 ampere, starting voltage without load, mAh erogated by the batteries until it reach 1.1V and 0.8V with load, average voltage during discharge with load
C. routine [start-peak-mAh-dT]
this mean: Charge with method described where you see "routine charge" under the battery description, starting voltage without load, peak voltage reached during charge with load, mAh erogated by the charger until the end, difference in temperature from the start to the end of the charge in celsius degrees
the voltage readings with load are made directly from the batt for avoid to calculate the resistance of the wires that take some mV
charges up to 1.5A and all discharges are made without fan, while charges at 5A are made with a fan at very low speed, just for mode a little the air that is closed in the charger