Doing nothing, how long does the battery last?

Started Feb 21, 2010 | Discussions
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Optimus Prime Lens Regular Member • Posts: 257
Doing nothing, how long does the battery last?

I have the D90 with the Nikon grip and 2 Nikon batteries. I thought they maybe going flat a 'bit' quick. I charged them both then put them both in the grip. I turned the camera back on about one and a half - two days later and the right one had gone down 6% and the left 4%. Now that seemed quick to me, but I have no experience of DSLRs such as this. Can someone please let me know if it sounds like a 'problem' or not. Obviously they have both gone down more since.

Supr X
Supr X Veteran Member • Posts: 4,956
Re: Doing nothing, how long does the battery last?

Optimus Prime Lens wrote:

I have the D90 with the Nikon grip and 2 Nikon batteries. I thought they maybe going flat a 'bit' quick. I charged them both then put them both in the grip. I turned the camera back on about one and a half - two days later and the right one had gone down 6% and the left 4%. Now that seemed quick to me, but I have no experience of DSLRs such as this. Can someone please let me know if it sounds like a 'problem' or not. Obviously they have both gone down more since.

-How many times has each battery been charged and 75% discharged? They will not perform 'optimally' until run through a charge and discharge cycle several(3 or 4) times . . .

Then they will last months with the D90 'on' and in it's auto-standby mode . . .
--
David~
WSSA Member #90

. . . shoot like there's no film in the thing!

Optimus Prime Lens OP Regular Member • Posts: 257
Re: Doing nothing, how long does the battery last?

Ahh, I hope that's it. Not done enough 'cycles' certainly. One did discharge completely (did so while camera off), will that have any 'adverse' effect?

Supr X
Supr X Veteran Member • Posts: 4,956
Re: Doing nothing, how long does the battery last?

Optimus Prime Lens wrote:

Ahh, I hope that's it. Not done enough 'cycles' certainly. One did discharge completely (did so while camera off), will that have any 'adverse' effect?

Probably not, when the battery is still so new, but as a general rule it is not good to allow lithium batteries to completely discharge. Think it is recommended to let them drop to nearly discharged(about 10-15%), but recharge somewhere short of a complete discharge. They do need to cycle a few times as a 'break-in', but then it is a good idea to use them until fairly discharged, but not completely. The D90 will stop doing things before it's battery is totally discharged.
--
David~
WSSA Member #90

. . . shoot like there's no film in the thing!

rbull44 Senior Member • Posts: 2,536
Re: Doing nothing, how long does the battery last?

I think that you are giving some good advice. I spoke with a Nikon rep and they told me to completely discharge the battery several times. That really didn't work that well.
--
Bob

Optimus Prime Lens OP Regular Member • Posts: 257
Re: Doing nothing, how long does the battery last?

Thanks Supr X for your advice. I'd also been given differeing advice by 'experts', it gets confuseing. I also saw a similar thread where you gave similar advice, and Eno posted a link to a helpfull web site on this matter. Very kind. Thanks again!

capanikon
capanikon Senior Member • Posts: 2,068
Re: Doing nothing, how long does the battery last?

Every battery discharges like that. It's unavoidable. Don't worry about it. I am into radio-controlled electric model airplanes that use lithium and nimh batteries and they discharge slowly if not used, also. Absolutely normal.

http://en.wikipedia.org/wiki/Self-discharge

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