#1  
Old 23-06-2008, 07:27 PM
TrevorW
Registered User

TrevorW is offline
 
Join Date: Aug 2006
Posts: 6,995
Battery Life

For some reason when using my camera with batteries (lithium and NiMh) over the last couple of nights (it's been quite cool over hear) taking pictures in RAW mode on bulb setting, I keep getting battery depleted although I know for a fact they are not has anyone else had a simliar problem.

Reply With Quote
  #2  
Old 23-06-2008, 07:36 PM
allan gould's Avatar
allan gould
Registered User

allan gould is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 4,481
As the temperature drops these batteries loose effective charge. You may have to consider a powered option or a large 12v battery running an inverter to the adapter.
Reply With Quote
  #3  
Old 23-06-2008, 07:54 PM
Omaroo's Avatar
Omaroo (Chris Malikoff)
Let there be night...

Omaroo is offline
 
Join Date: Aug 2006
Location: Sydney/Cooma
Posts: 7,628
Trevor - How cold is it getting where you are? Even in Cooma it only gets to -10 or 11C. How old are your batteries?

Lithium ion cells (wet electrolyte type rather than dry) are designed to work reliably to -20C or so. Below this the increased impedance of the electrolyte affects the rate capability. These batteries should even work at temps down to -30C, and while they may slow to a trickle you won't damage them. They don't lose charge, as such, but their ability to supply their stored energy is compromised at lower temps.

Unless you go with a battery grip that holds a couple of cells in parallel (may work for you as it does me) then you are probably best advised to go with the direct DC source as mentioned.
Reply With Quote
  #4  
Old 25-06-2008, 05:17 PM
Tandum's Avatar
Tandum (Robin)
Registered User

Tandum is offline
 
Join Date: Apr 2008
Location: Carindale, Brisbane.
Posts: 4,113
Maybe the batteries are stuffed ? I bought 2 new batteries off ebay last night for AU$16 delivered from Honkers
Reply With Quote
  #5  
Old 26-06-2008, 12:16 PM
StephenM's Avatar
StephenM (Stephen)
Registered User

StephenM is offline
 
Join Date: Dec 2007
Location: Brisbane
Posts: 2,399
Hi Trevor,

My K100D did the same thing in B mode with rechargable batteries. It seemed to me that the batteries were losing their ability to fully charge. I'm using non-rechargable CR-V3s at the moment and there's no problem.

Cheers,
Stephen
Reply With Quote
  #6  
Old 26-06-2008, 03:31 PM
TrevorW
Registered User

TrevorW is offline
 
Join Date: Aug 2006
Posts: 6,995
Stephen I've tried AA litium as well and they weren't cheap had the same problem. I'm looking at getting an AC adapter but the Pentax ones $100. Hopefully i'll be able to source something cheaper.

Regards
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 02:20 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
NexDome Observatories
Advertisement
Lunatico Astronomical
Advertisement
Celestron Australia
Advertisement
Meade Australia
Advertisement
SkyWatcher Australia
Advertisement
OzScopes Authorised Dealer
Advertisement
Astronomy and Electronics Centre
Advertisement