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Old April 6th, 2008, 08:48 PM   #1
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Memorized batteries

My JVC BN-V438U Lithium-Ion Batteries (7.2v, 3800mAh) for JVC GY-HD100,
were bought three years ago, and now they are giving me short time of work.
My colleges toll me they are "memorized" and don't receive the full charge.
Questions:
1. Is there a way to clean up the memorize fenomenon?
2.How to evoid it in the future if I can clean up them or with new ones?
Thanks.
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Old April 6th, 2008, 08:57 PM   #2
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Hello
those batteries have very short life span between charges
when there new
you should think about getting a IDX OR AB SYSTEM
THANK YOU
joe

Last edited by Joseph A. Benoit; April 7th, 2008 at 05:54 AM.
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Old April 6th, 2008, 09:06 PM   #3
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Thanks

Thanks, Joseph.
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Old April 6th, 2008, 10:11 PM   #4
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I was also thinking that only Ni-cad had memory issues. LI's will wear down, but they shouldn't ever need to be completely depleted (and I believe that should actually be avoided) to solve a memory issue.

Matthew
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Old April 7th, 2008, 02:00 AM   #5
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Before I got an IDX system I picked up some extra Impact batteries from BH for about 50% the price of the JVC ones. A little more power too. Impact makes several batteries. $49.95 gives 3200mAh's compared to the stock battery of 2800mAh's. Pick up a couple and give yourself some breathing room. They should last a little more than an a hour with LCD open and using the zoom, Just long enough for a 63 minute tape and some standby time.

These days I'm running an IDX system that I'm happy with it. 4 or 5 hours runtime out of the IDX battery, but for the price, it's hard to beat picking up 4 of the Impact batteries.
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Old April 7th, 2008, 11:39 AM   #6
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the model

Thanks Alex it's a good choice.
What is the model of the Impact batteries for the JVC camera?
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Old April 7th, 2008, 12:30 PM   #7
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If you want to stay with the JVC little batteries, I bought extras from this guy on ebay at $16.22 each. They are 3400mah, last about an hour and they work fine, I have five of them and have used them for almost a year now. Ebay Item#13021101024

I think Li-Ions don't have memory, they just wear out.
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Old April 7th, 2008, 12:42 PM   #8
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Lithium Ion batteries do not suffer from a memory efect. They do however have both calendar life and cycle life. They will loose capacity as a function of time and as a function of the number of charge-discharge cycles. The higher they are charged and the deeper they are discharged, the shorter the cycle life. Li Ion batteries like shallow cycling.

Temperature will also have a dramatic effect on life.

Best,
Michael
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Old April 7th, 2008, 05:22 PM   #9
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Quote:
Originally Posted by Michael Paris View Post
Lithium Ion batteries do not suffer from a memory efect. They do however have both calendar life and cycle life. They will loose capacity as a function of time and as a function of the number of charge-discharge cycles. The higher they are charged and the deeper they are discharged, the shorter the cycle life. Li Ion batteries like shallow cycling.

Temperature will also have a dramatic effect on life.

Best,
Michael
So Michael, are you saying that we need to keep our batteries charged (not fully charged) and not discharged to exhaustion to keep a good cycle life?
I've had NP-F950 batteries since early 2000 that are only 20 minutes less than the NP-F970 batteries I have had the past few years...
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