Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
10-19-2016, 07:57 AM   #1
Seeker of Knowledge
Loyal Site Supporter
aslyfox's Avatar

Join Date: Aug 2016
Location: Topeka, Kansas
Photos: Gallery | Albums
Posts: 23,043
batteries - draining, charging and/or rotating

not sure if these questions have been asked and answered before, if so, I apologize

I have the Pentax K 3 and K 5 II with the optional grip/battery accessory. Currently the K 5 II is my back up camera and I am not using it. should I remove the batteries from it?

I have been using the K 3 with the original battery and a non Pentax replacement battery in the attached grip. I have been recharging the battery in the grip only. (I'm lazy and that can be done without detaching the grip from the body.) Should I rotate that battery with the one in the camera body so that both get drained and recharged?

at what level should I discharge the battery before recharging? Should it be completely drained or is it ok to recharge it even if there is still charge left in the battery.

Both grips allow the substitution of the rechargeable battery with AA batteries, should I use those some of the time or would it matter?

I use the grips even though I don't really need the back up battery because I like the feel of the camera with it.

thanks for all the advice and help.

10-19-2016, 08:10 AM   #2
Veteran Member

Join Date: Jun 2015
Location: South West UK
Photos: Albums
Posts: 1,493
Lithium batteries are not fussy like the old Ni-Cad or NiMH batteries. Charge them whenever and at whatever level. If you are leaving them unused for a prolonged period they are best left part charged, not totally flat.
It is probably best to leave the battery in the unused body to prevent loss of settings and give it a charge periodically.
10-19-2016, 08:31 AM - 1 Like   #3
photoptimist's Avatar

Join Date: Jul 2016
Photos: Albums
Posts: 4,728
Totally draining a lithium ion battery (especially multi-cell batteries like those used in DSLRs) risks shortening the life of the battery. Some device makers do suggest occasionally using a LiIon battery until it's exhausted to help calibrate the battery-level indicator but I'd not do that too often (once a year) and only if you are really concerned about the accuracy of the battery level indicator.

Never leave a low/dead LiIon battery in the device -- the device will slowly continue to drain the battery until the battery is damaged.

As victormeldrew said, do leave a charged battery the camera to preserve the time/date settings of the camera and prolong the life of the tiny rechargeable battery built into the camera that keeps the clock ticking when you are swapping batteries.

For cameras that don't get much use, set an alarm on your computer to remind you to recharge or swap batteries in your backup camera very 4 to 6 months.
10-19-2016, 08:54 AM - 1 Like   #4
Loyal Site Supporter
Loyal Site Supporter
UncleVanya's Avatar

Join Date: Jul 2014
Photos: Gallery | Albums
Posts: 21,002
My recommendation after researching this is that 40% charged is the optimal long term storage level for LIthium ION rechargeables for lifespan of the batteries.

BU-702: How to Store Batteries ? Battery University

10-19-2016, 09:15 AM   #5
Seeker of Knowledge
Loyal Site Supporter
aslyfox's Avatar

Join Date: Aug 2016
Location: Topeka, Kansas
Photos: Gallery | Albums
Posts: 23,043
Original Poster
You guys are great. Thanks for the quick responses
10-19-2016, 10:21 PM   #6
Senior Member

Join Date: Dec 2012
Location: Orting, WA
Posts: 252
Beating a dead horse

Since the original poster mentioned it, I'd like to say, "Yes! You should use AA batteries periodically (NiMH) or more often because they're more standard and have less battery management issues than most Li-ION batteries." But realistically, most people get along with Li-Ion's just fine even though they cook them to death and then starve them to death repeatedly. My issue with them is mainly that I have to have a **** dedicated charger for each device that takes a specialty battery, but if people came to their senses and just used standard batteries, I could use one universal charger to cover everything (like flashes AND camera body).

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
batteries, battery, body, camera, drain, grip, grips, ii, k 3, k 5 ii, pentax, pentax help, photography, recharge, troubleshooting
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Solar charging 645D (D-Li90) batteries dwp Pentax Medium Format 9 01-11-2013 01:42 PM
Macro Draining it dry! eaglem Post Your Photos! 7 12-23-2012 03:23 PM
Camera buying is emotionally draining einstrigger Photographic Technique 11 10-13-2011 12:26 PM
AF 280T- Not charging, or anything mediaslinky Pentax DSLR Discussion 7 03-30-2011 03:35 PM
Canadian taxes and charging? dugrant153 Photographic Industry and Professionals 19 03-24-2009 11:06 AM

All times are GMT -7. The time now is 04:43 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]