Originally posted by davekimber Many thanks for all the advice regarding these batteries, In the UK the genuine Pentax batteries are priced at £50 to £75 approx $100 to $150 US.
The grip is Approx £200 ($400US) can be purchased cheaper I got mine for £99 ($200US) My Sigma DG50-500 was a whopping £750 ($1400US).
It may be shaving corners to get a cheaper battery but I have plain run out of cash!!!
I am on Safari in Africa from the end of the week so a second battery of any sort would be better than none
I have seen some inov8 batteries at £19 ($38US) running the higher voltages so may purchase one until I can afford a genuine one.
Dave
Dave:
Please note . . . the "voltage" (7.4v) is the same for all of these batteries the mAh (millAmpHours) is the difference. Yes, a battery with 1500 mAh will, theoretically, provide fewer shots. The difference in mAh does not indicate that the battery is under powered (a function of the voltage), it simply does not hold it's charge as long. But, again, when we are talking about 700-800 shots, is there a real big difference?
Further, if you do see a battery with a voltage other than 7.4v, I would advise that you not get it since the difference in voltage could damage your camera . . .
You want a battery that delivers 7.4v . . . no more, no less.
I have been using the Minolta batteries since I got my K10D (last November) and have not experienced any problems . . . several other responders have also indicated the same experience.
Hope this helps.