Look, I am no scientist...nor am I any electronics engineer, but here are my test results for my own battery benchmark.
And it is possible that I am comparing apples to oranges here, because I didn't charge all the batteries in the same fashion.
For the individual 18650 cells, I used a generic 2 cell charger that I bought on eBay for a couple of bucks. It has overcharge protection built into it, so perhaps the level it charges the batteries to is different than the level the Mobilepro charges the batteries to. And the Ultrafire batteries also have their own circuitry to prevent overcharging and over-discharging of the cells...so perhaps that will make a difference in the overall capacity as well. With those caveats, I will continue.
To drain my batteries, I used my MP790. I used Smalltweak to turn off all the alerts and to keep the system on. The LCD on my 790 was set at maximum brightness. I used an Lucent Orinoco card and made a wifi connection. I used npopuk to keep the card active and it checked my gmail account every minute. I turned off all power saving features on the wifi card and set it for max power. In otherwords, I put as heavy a drain on the thing as I could.
BTW gjcoram, npopuk log file made it so easy...I checked the starting time and subtracted it from the last log entry before the thing went kaput...thanks!
For the batteries, I used the standard MC-BA9..an old one still running after 14 years. I also use an MC-BA14, and a newer Laptops for less 2000mAh battery in a MC-BA9 shell. For the individual 18650 cells, I just hooked them in series and plugged them directly into the power jack on my 790. The Panasonic batteries were pulls from an old HP laptop battery. The Ultrafires are the newest and I just ordered and received them this past month.
The results are shown below. As exepcted, the higher mAh rated cells lasted longer. The Ultrafires did not last as long as you would expect a 4000mAh battery to last. Theoretically they should have doubled the endurance of the LFL MC-BA9. Instead they lasted about somewhere between 3000-3500mAh cells would if the chart holds true. Still, they were significantly more powerful than any of the other cells I had on hand. I have some Sony 3200mAh cells coming...I'll see how they compare to the Ultrafires when they get here...
(charger.jpg) (Battery Stats.jpg) Attachments
----------------
charger.jpg (53KB - 0 downloads) Battery Stats.jpg (72KB - 0 downloads)