Originally posted by Venturi FWIW, you can pay $40+ per battery or you can pay $10.
$10 shipped? Where? I've yet to find such. Most I've seen are $20+ shipped.
As I said, $20 shipped to sub-$40 shipped, is a difference of $20.
My K20D + DA 16-50 f/2.8 + DA 50-135 f/2.8 was over a $2,000 system.
So to pay for a Pentax branded battery, that was a $20 / $2,000 = 0.01 = 1% premium.
It's everyone's choice own choice.
If this was a simple, common Nickel or other chemistry that doesn't require active regulation in the unit and is non-proprietary, I wouldn't care.
But this is Li-Ion, which have active regulation in the unit, is certified, design, integration and regression tested for a particular device.
As someone who has seen variations against voltage regulators driving microelectronics from rechargeable Lithium chemistries, I mitigate risk first'n foremost.
In this case, a +1% system cost is a no-brainer from a risk mitigation standpoint.