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Memory Effect
#1

Ok here's a question for you shuttertalk people. Do NIMH batteries have the memory effect? NiCad definitely does. Li Ion does not i think...

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I am the mighty Cervantes!
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#2

No. Not to an appreciable degree. There is a tendancy toward early death if cells are not discharged fully at irregular intervals, but we're talking, what... 5% ish?
Having said that, NEVER discharge cells out of the specific equipment unless you own a discharger. Do not grab random resistors and try to drain your batteries through them!

Cave canem
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#3

They all have memory effect, from what I've read (no personal research myself); but as Rufus said, not to an appreciable degree; so you won't notice it much, but it'll die after many many charges Smile
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#4

Rufus Wrote:No. Not to an appreciable degree. There is a tendancy toward early death if cells are not discharged fully at irregular intervals, but we're talking, what... 5% ish?
Having said that, NEVER discharge cells out of the specific equipment unless you own a discharger. Do not grab random resistors and try to drain your batteries through them!


huauhauh .. i discharged some batteries before using a mini motor ...
does a great job of draining the batteries.. no dodgy resistors tho .. thats a fire hazzard ~_~
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#5

Hi and welcome, smoochy!

It's such a science isn't it? Like the others are saying, I don't think you need to wait until the batteries are completely discharged before recharging NIMH. Also, batteries will age over time and lose their effectiveness.

However, I've been reading a few sites - they recommend discharging your batteries once in a while, but here's the catch -- you musn't discharge them fully. Only discharge them to about 0.9v. Discharging your batteries to absolute zero V will make them useless. They recommend using a discharger or charger with discharge-charge cycle that will automatically do it for you. (Not a motor, peter!! Smile )

Interestingly enough, my camera has a battery discharge function...
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#6

I could discharge my batteries by putting camera into bulb setting and leave it open... haha, a fully battery is expected to last 2.5 hours with shutter open; haha Smile
Not only do you get a discharged battery, but you get a nice picture! (maybe with a lot of hot pixels, but nice star trails) IF the battery dies; then the picture wouldn't get saved; would it?
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#7

uhahua
our bettery is Lithium ion adam ..
so we dont really need to discharge it ..
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#8

That's true Smile Since the life depends on how many cycles it has done, or something like that Tongue
I'll get some backup BP-511's though, third party higher capacity ones Smile
At the moment, it's one of our limitations when out shooting - battery life!
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#9

yeah .. go buy us some 1600mAh ones ...
then ill pay you back ..
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#10

I don't think I can get the 1600mAh ones as I'm already looking to get these ones:
East-gear BP-511 1500mAh.

Would you trust third party batteries? It won't void the warranty unless it causes your camera to break, would it?
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#11

it shouldnt .. unless battery acid starts leaking into ur cam cause the battery gets a hole in it .. Smile

how much is the price adam ?
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#12

Price is approximately $30, we'll see as get closer to date.
Dad going to S'pore in a month or so I think.
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#13

yeah ..
and then you can get me some goodies..
mabye ...
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#14

We'll see Smile
I could quite possibly request some BP-511 Wink
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