This had my curious, so I looked at my k-7 battery and it was chrome plated. Manufacture date 2009. I still regularly use that battery and have not had any problems with shorter battery life. 700 shots is attainable probably. I will clean my contacts though. My batteries always end up in pants pockets.
Bipin Gupta <[email protected]> wrote: >Some points on getting the most from the D-Li90 Battery:- >a) Note: the Pentax battery supplied with the K-5 no longer has the >better Gold plated contact pins. It is plain chrome plated only, and >prone to oxidation, where an opaque layer or a film forms on the pins. >b) Was frequently getting the depleted battery sign on the K-5 with >the Pentax original battery. It gave just (400) shots from a full >charged battery - flash not used. >c) Used pure ethyl alcohol & Q-tips to clean the contact pins and then >polished them off with a soft cloth. >d) The depleted battery sign menace has gone away, and I now easily >get around 700 shots. >e) Last week a 3rd Party battery arrived from Singapore for $ 7 >shipped. Looks very good and matches the Pentax Amp Hour Rating - 1860 >Ah. I put it for charging in the Pentax original Charger. The Green >charging light would come on and the shut down immediately. First >thoughts - bad battery. >Then I cleaned the contact pins as in Sl. c) above. And voila the >battery charged very well. > > f) I keep a voltage >record of all my batteries - discharged and fully charged. The >Singapore battery measured 8.50 volts vs 8.45 for the Pentax when >fully charged. Which means it is just as good and will last longer >than the Pentax original. >g) How do I make this claim?I have kept voltage records of all my >D-Li50 battery for the K20D for the last (4) Years. All the batteries >are still going strong - (1) Pentax original and (3) 3rd Party. I use >it in the Camera as well as in the original D-BG2 Grip. >As the battery age, the full charge voltage keeps going down. Here are >some results:- Pentax original when New - 8.46 v, after 42 months - >8.24 v; 3rd Party 1 - 8.54 v & 8.28 v; 3rd Party 2 - 8.56 v & 8.17 v. >And these 3rd Party batteries for the K20D are just as good even after >(4) years - Amazon com and EvilBay purchases. >Thanks for reading this post. >Bipin - from the far away enchanting land. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
