"I hate vague information so I contacted orbtronics about it
this is the reply:
'Hi William,
Yes, that's the improved PD. It runs even cooler on high Amps, and improvement on voltage drop. Nothing significant. 30-40 mAh more in capacity as well.'"
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"The only thing i could find was the internal resistance change, and the chemistry change,
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the PD is 22mΩ with a Lithium Nickel Cobalt Aluminium core,
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the PF is 35mΩ with a Lithium Nickel Manganese Cobalt Oxide core.
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From what i can tell, the new PF chemisty will be better for longer high drain applications and should be less prone to damage over time."
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"The PF is a nice cell for sure. It is supposed to last longer (more charge cycles, handle more abuse) than the PD. It appears that it also performs as well or better than the PD.
Here's a review from Tom E:
Ordered 4 of these at first, and 2 protected versions. In my 4.9A Nanjg, copper pill, XM-L2 U2 configured HD2010, when fresh at full charge, these got higher amp readings than the Pana PD's they replaced! Interesting because the PF specs said they had higher resistance than the PD's, but opposite seems to be true. Here are some of the measured amps, all fresh charged: Pana PD's: 4.26A/4.25A Pana PF's: 4.43A/4.45A Powerizer: 4.90A Samsung 20R: 4.83A Samsung 20Q: 4.50A Sanyo UR 18650FM: 3.85A Panasonic B (3400, unprot): 3.69A ** There are variations, and some cells are 4.21v, others may be as low as 4.16v. If 2 cells were tested, both are listed separated by a slash (/). ** Highly recommend these for there longer runtimes of 2900 mAh at high amps"
