Until then I had big difficulties to use my Pentax K200D with NiMH batteries "classic" even capacity 2700 mAh. I often marked "dead batteries" as soon as I was even a picture with the flash, even with freshly charged batteries. With these Eneloop batteries, yet they have only a capacity of 2000 mAh, I can link the pictures with flash without any problems. These batteries are perfect for my Pentax K200D.