Originally posted by bschriver11 Your rolling the dice on Wasabi batteries in my opinion, i had one and it didn't have half the capacity although they claimed it had more than the Pentax battery that came with the camera did and after 1-1-1/2 years moderate use the battery swelled and got tight in the camera.Really i bought two of them, the first one and the last one.I bought a cheap AA battery adapter for my K-50 and use the 2500 mAh Amazon basic batteries and i'm very pleased with them, i get more than double the life of the Pentax battery out of this set up and with the adapter you always have the option to use regular AA batteries if the need should arise.
After 1.5 years and your battery swelled, I would say that's a total loss. You got 1.5 years out of a set of batteries that weren't OEM.
Although, I do have to say I've had some glitches with the ones I bought last week. First thing I noticed was yesterday the camera showed the battery as almost depleted of power, but turning the camera off and back on, it showed as full. Today, after using the flash, it again showed as depleted, and turning camera on then off showed half battery power. If it keeps doing this, they're going back. They have a three year warranty on them and Amazon (where I bought them) allows me to return within 30 days.