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How to tell how many charges a battery has had?


2 years 6 days ago #736296 by Ontherocks
Is there a way to tell how many times a camera battery has been charged?  
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2 years 6 days ago #736299 by Nikon Shooter
In one word? No.

In the NiCad days, many attempts in that direction were all given
up because of reliability issues. One thing did remains from those
days: whatever the electrochemical compound used, the nominal
voltage should read the same value among all the cells in a pack.

Any value lower than the pack average shows a loss in performan-
ce.

HTH.
Light is free… capturing it is not!
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2 years 6 days ago #736300 by Shadowfixer1
Some cameras can report the health of the battery but not the number of charging cycles. 
www.betterphoto.com/?ramshots
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2 years 5 days ago #736375 by Ontherocks
You would think there would be a way.  I seem to recall you can look up easily battery life and charge numbers with DJI.  Thought there might be a way with our camera batteries.  

OK, well thanks guys!  
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2 years 4 days ago #736387 by CharleyL
I pull any batteries that take excessively longer than their counterparts as they become charged. Most AA rechargeable cells get used in groups of 4 in my speedlites, and usually reach the charger at the same time. If any take excessively longer to be fully charged, I remove them from use. My experience over these last few years has shown that cells that take significantly longer to recharge than others that were used together don't hold their charge very well, so I remove them from use. I keep plenty of spares on hand.

Charley
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2 years 4 days ago #736431 by Sandy Smith Photos
So how long are these batteries supposed to last before they start loose their 100% ability?  
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2 years 4 days ago #736436 by Ontherocks

Sandy Smith Photos wrote: So how long are these batteries supposed to last before they start loose their 100% ability?  



I’m still trying to figure that out myself.  
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2 years 2 days ago #736557 by CharleyL
I was putting "/" marks on my AA cells with a black dry marker every time I recharged them, I quit after I reached the other end of the cells. Since most of mine are used in speedlights and their aux battery boosters, and are used in groups of four, I now just watch how long it takes the cells to recharge in comparison to the other cells in the group. They should all be discharged to the same level in the group, so if any take significantly longer to recharge (more than 1/2 hour) than the rest in that group, I pull them out of the group and replace with a new one. I have plastic boxes that hold and store each group of 4. + to the right means that they are recharged. + to the left means that they have been used and need recharging. If they don't get used for several months, I'll put them back through the recharging process so they are at peak and ready for use. Right now I have about 120 rechargeable AA cells, 20 AAA cells, and 4 nine volt batteries that are rechargeable. My large charger is a Bonai that can recharge 16 AA or AAA cells and 2 nine volt cells at a time. I have a smaller charger that can do four AA or AAA cells at a time, but it now resides in my field kit, for emergency use.

The Bonai charger came from Amazon and is over a year old with no problems. Each cell's charge level is displayed while it's charging, so easy to see when fully charged, or when one isn't taking the charge well.

Charley
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2 years 19 hours ago #736617 by Ontherocks
Hey thanks again!
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