If you use the original charger, there is no problem. Have used them for a few years.
Hey Felix! How have you been?
I cannot explain why both the Original Pentax & OEM "D-Li109" batteries bloat almost reaching 1 year of service
I have tried all techniques to prevent bloating by:
- Fully draining off the excess remaining power before removing the battery from my K30
- Not fully Charging the Batter to full capacity
- Charging only up to 80%-90% capacity
As a former Colour TV Technician from Toshiba, I understand how electronic circuitry works.
I have stripped both the Original Pentax & OEM Charger to examine & only to discover that both have identical circuitry, which make me assume that the OEM version has been copied or it's an "Identical Duplicate".
Therefore there I can say that there is no risk of using both the OEM Charger & Batteries.
Not sure if these Bloating problem is found in D-Li90 Batteries.
However I have found another solution, where I use the Double AA Nimh rechargeable batteries on my K30.
GP Batteries & the new GP USB 2-hr Charger give me a longer Battery life than the "D-Li109".
Thanks to you "Felix" for selling me the "AA Adapter"
Lets catch up for a Photo Shoot