Originally posted by tvrrproto48 My "New" K-5 showed up and I decided to give the battery in it a full charge and decided to charge the battery in the K10D and K-30
The K5 D-LI90 battery does not fit into the K10D nor the K30
You cannot charge any of those in any camera/body but only with the appropriate charger.
All have different chargers.
It is possible though to manipulate the chargers a bit to charge the K30 D-LI109 battery in the K5 D-BC90 charger
and it is possible with some mods/position to charge the D-LI90 K5 battery in the charger of the K30=D-BC109.
Originally posted by tvrrproto48 That's when I found the problem
Not if you tried to charge the K5 battery in a K10D or K30 because it is not possible.
Originally posted by tvrrproto48 Years ago I had picked up the Pentax AA battery holder for the K-30. Some time late last year I had drained the rechargeable battery and put the holder in with a fresh set of batteries and than forgot about it. Because of covid I haven't taken many photos this year and the battery indicator showed a full bar so I never thought anything about it. Well I charged the Li battery and put it in and the problem went away. I can now turn it off and back on and everything is saved.
I guess you charged the D-LI109 (K30) battery in the K5 D-BC90 charger?
That does work if one holds it in a particular way so the contacts of the battery have the contact to the charger contacts
and the green light goes on.
This could mean that your D-BC109 (K30) charger did not recognice it or had problems with it.
Originally posted by tvrrproto48 That's when I got looking at the AA pack and noticed there is only two tabs on it as opposed to three on the Li. My guess is the third tab on the Li is a lower voltage output to maintain the memory and keep the on board battery charged. Wish Pentax had put that in the instructions with the battery holder or maybe they did and "old-timers" over took me.
No, that is completly wrong!
The AA pack has 2 contacts because the camera notices AA batteries instead of Li-Ion
The mid contact of the D-LI109 is a sensor for temperatur! Protection
The D-LI109 and the new D-LI90P have both 4 contacts!
The 4.th contact again is not for sending 3V to the memory battery which is done onboard and is regulated on the Mainboard of the camera!
The 4.th contact was required in Japan for better monitoring the battery, it is law only in Japan.
The K10/20D batteries had only 2 contacts:
+ -
K7/K5/K3/K-01= D-LI90 have 3 contacts:
+ - and
T (T for Temperatur)
D-LI90P:
+ - T +
D (Digital Monitoring)
Cheap no-name chargers have only 2 contacts! They don't check for temperature overload and usually are quickchargers.
The way they also keep the charge is not that great at all:
They often use trickle charging (pulse) which is bad for Li-Ion!
See:
https://batteryuniversity.com/index.php/learn/article/charging_lithium_ion_batteries
The AA Adapter does not need T for Temperature
Whatever happened when you charged the D-LI109 making it work, great!
Now check if it charges the memory battery as well!