VisorCentral.com - NiCad vs. NiMH

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VisorCentral.com (http://discussion.visorcentral.com/vcforum/index.php)
- Accessories (http://discussion.visorcentral.com/vcforum/forumdisplay.php?forumid=3)
-- NiCad vs. NiMH (http://discussion.visorcentral.com/vcforum/showthread.php?threadid=10818)

Posted by Eug on 01-18-2001 02:40 AM:

Oh yeah. There is a bit of info here. Hope it helps.

http://www.visorcentral.com/faqindex.php3#II.H.1.

Posted by Belzebutt on 01-24-2001 10:10 PM:

quote:
Originally posted by DBrown
And if Handspring really only expected you to use alkalines, they wouldn't have included a method of changing the battery meter to expect NiCAD voltage levels.

I've got NiMh's in my platinum, running with the battery meter set to NiCad. They work fine.

Dave

Why do you use the NiCad setting on your Platinum? It has an NiMh setting, is there a reason why you choose to use NiCad with NiMh batteries instead?

__________________
Belzebutt

Posted by Belzebutt on 01-24-2001 10:18 PM:

quote:
Originally posted by Eug
Actually, it would seem the new standard for digital cameras is LiIon, since they do not discharge (much) if left for weeks, unlike NiMH.

When I was looking for info on the new Energizer NiMh's, I found an article about NiHm on their site. It said that NiMh rechargables discharge by 1-3% per day if left unused. This isn't really negligeable, since over 5 days they can discharge by over 10%. I usually end up waiting a couple of days before recharging my second set after I used it, to get a really full charge

__________________
Belzebutt

Posted by DBrown on 01-24-2001 11:32 PM:

quote:
Originally posted by Belzebutt
quote:
Originally posted by DBrown
And if Handspring really only expected you to use alkalines, they wouldn't have included a method of changing the battery meter to expect NiCAD voltage levels.

I've got NiMh's in my platinum, running with the battery meter set to NiCad. They work fine.

Dave

Why do you use the NiCad setting on your Platinum? It has an NiMh setting, is there a reason why you choose to use NiCad with NiMh batteries instead?

At the time I wrote the above, I was speaking of the basic Visor I had gotten for my wife. We were both using it until I got my own Platinum. I don't believe the basic visor had a setting for NiMH. Thus I used the NiCad setting.

Dave

__________________
There is nothing yet made by man that cannot be improved upon.

Posted by Belzebutt on 01-25-2001 03:40 AM:

quote:
Originally posted by thatch
Finally! something I know about!
(picture of Handspring device)

Tim, what is that thing you have a picture of in your post, the little gray handheld device with the big Handspring logo?

__________________
Belzebutt

Posted by thatch on 01-26-2001 02:14 AM:

Re: What about Energizer's e2?

quote:
Originally posted by CrayDrygu
I've got a set of Energizer's new "e2 Titanium" batteries in my Visor now...anybody else have experience with these?

I really don't like them for how much I paid. I got 3 1/2 hours of play in a Memorex 8085 MP3-CD player, and should be getting 3 hours for regular batteries, and 6 hours for alkaline! I found some brand-new surplus Nicads at BG-Micro for less, and plan to replace the Enegizers with them. Ick.

__________________
Tim
<A HREF="http://vbq1.tripod.com/"></A>

Posted by Belzebutt on 01-26-2001 02:36 PM:

Whatizit?

So what is this thing:

__________________
Belzebutt

Posted by Winchell on 01-26-2001 02:43 PM:

Poor Thatch. He might have to put a description in his sig. Everytime he posts somebody asks "what is that thing?"

The image is a photo of a gadget from Star Trek: Voyager, to which Thatch has added the Handspring logo.

Posted by MarkEagle on 01-26-2001 11:50 PM:

quote:
Originally posted by Winchell
Poor Thatch. He might have to put a description in his sig. Everytime he posts somebody asks "what is that thing?"

I've seen the question asked dozens of times and he never answers... keeps us all in the dark!

But now, thanks to Winchell, we know the answer, don't we?

__________________

God bless America, my home sweet home...

Posted by prometheus on 01-27-2001 04:45 AM:

quote:

The real downfall of NiCad batteries is that they can (and do) lose their power even while they are inactive. They have a tendancy to have
very inconsistent power output, whereas NiMH puts out a more consistent voltage. NiMH batteries also tend to last a lot longer than
NiCads; a well treated set of NiMH batteries can be recharged between 700-1000 times.

NiMH also discharge. NiCd cells will discharge at about 1%/day. NiMH will discharge at 3-5%/day. Both NiCd and NiMH have very flat voltage discharge curves. Both will last a long time, though I can't give any numbers.

quote:

As for NiMH vs NiCad, NiMH's are superior. They're higher capacity and are better suited for high-drain applications. (they're the
"standard" for digital camera's - devices that are very power hungry). NiCad's die quickly as their voltage level drops. NiMH's are a bit
more forgiving. Plus, NiCad's suffer from the "memory" effect and really must be almost fully discharged before recharging. NiMH's can
be safely recharged at any level as they don't suffer the same "memory" effects.

Bottom line, NiMH's are the way to go if you're going to use rechargeables. A little advice, though: invest in a good charger. The
batteries can be negatively affected by an inferior charger. I use a Maha MH-C204F which is rated as one of the best NiMH chargers on
the market.

NiMH also have a steep dropoff at the end of the cycle, however, the lighter weight of the cells and the reduced memory effect make them the better choice over NiCd cells.

You're right about a good charger. Li-Ion cells also need a good charger. Too bad you can't get them in standard sizes.

There's some more info on another thread.

http://discussion.visorcentral.com/...?threadid=11008

p

Posted by yoonfui on 01-29-2001 02:39 AM:

quote:
Originally posted by thatch
Finally! something I know about!

The main difference is that you are supposed to deep-cycle (run dry) Ni-Cds to keep them from developing a memory. On the other hand, NiMHs will lose a small portion of their capacity (somewhat like a memorty) if you do deep-cycle them.

I know about the fact that fully dis-charging NiCad batteries helps extend their battery lives, but I have some questions the NiMH batteries. I've never heard of "deep-cycling" NiMH batteries can make them lose their capacity.

In fact, I've heard of recommendations that the first times new batteries are used, they should be deep-cycled to improve their lives.
http://www.energizer.com/

Or that if a pair of batteries are over-discharged, the weaker of the pair may reverse the polarities of its electrodes, causing irreversible harm.
http://www.vencon.com/articles/reds1.html#OverDischarge

more data on NiMH battery:
http://data.energizer.com/batteryin...tion_manual.htm

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