Excellent information, Bipin. Thank you for sharing it! On Fri, Apr 5, 2013 at 1:46 PM, Bipin Gupta <bip...@gmail.com> 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 > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions.
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