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antedeluvian
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Hi Top
antedeluvian   2/7/2014 4:07:46 PM
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Another great part to your continuing series.

 

Although slightly off topic, I am reminded that National (Panasonic) used to make a range of batteries called "Hi-Top". I am not sure if they ever included an alkali cell and according to this history they used manganese. We were designing our own portable unit for the miltary powered by 6 D cells. I don't know where they got the dimensions for the batteries from, but when we tried to power it up for the first time we wanted high quality batteries and opted for the Hi-Top range. Big surprise- they wouldn't fit. We tried an Everyready D cells and sure enough they fitted fine. It then dawned on us why the product was named "Hi-Top". The top of the D cell was higher than any other. It probably fitted in a commercial product with more give in the spring contact, but it made suckers out of us.

Max The Magnificent
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Re: Hi Top
Max The Magnificent   2/8/2014 11:03:18 AM
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@Antedeluvian: Another great part to your continuing series.

I agree -- I think that once Ivan has finished covering all of the various battery types, followed by his "grand comparison," this series is going to make an invaluable quick-reference guide to battery technology.

 

antedeluvian
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Re: Hi Top
antedeluvian   2/8/2014 11:17:23 AM
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Max,Ivan

I think that once Ivan has finished covering all of the various battery types, followed by his "grand comparison," this series is going to make an invaluable quick-reference guide to battery technology

I think it could be expanded and made into a book. I know I would buy it. Please Ivan, allow Max to persuade you to do it. I am sure he would happily write the foreward. Just don't expect to become rich!

Max The Magnificent
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Re: Hi Top
Max The Magnificent   2/8/2014 11:25:53 AM
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@Antedeluvian: Just don't expect to become rich!

Tell me about it -- if I look at the amount of time I've put into writing books, compared to the financial pay-back, I'd have been better off working as a greeter at Wal-Mart

But there's more to it than money, of course -- first of all, writing a book makes one's mother very proud. It also opens doors. Plus, of course, there are all the groopies LOL

antedeluvian
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Re: Hi Top
antedeluvian   2/8/2014 12:41:41 PM
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Max

first of all, writing a book makes one's mother very proud.

 

Check.

It also opens doors.

Mine is very good at holding up broken table legs. It will also keep doors open, but won't open them.

Plus, of course, there are all the groopies LOL


Yeah, right! I think only one person has ever said to me: "didn't you write that book..." and he was a smart salesman who googled the people who were going to be at his sales call.

Max The Magnificent
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Re: Hi Top
Max The Magnificent   2/8/2014 12:55:26 PM
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@Antedeluvian: I think only one person has ever said to me: "didn't you write that book..." and he was a smart salesman...

Maybe he really liked you :-)

eetcowie
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Re: Hi Top
eetcowie   2/10/2014 5:19:33 PM
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It seems like there would be many books already out there by now. I will take a gander at what is available, and if it looks like they aren't covering the topic like I want, I would consider writing one.

No, I would not be writing it for the money. Besides, I will have already given away most of the really good stuff for free for all the EETimes readers, anyway!

antedeluvian
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Re: Hi Top
antedeluvian   2/11/2014 9:02:32 AM
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Ivan

 I will take a gander at what is available,

Here are 3 that I have bought and used:

Handbook of Batteries (an earlier version than this one)

Rechargeable Batteries Applications Handbook

Secrets of Lead Acid Batteries

 

 

 

eetcowie
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Re: Hi Top
eetcowie   2/13/2014 4:18:41 PM
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ahhh...thanks.

eetcowie
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Re: Hi Top
eetcowie   2/10/2014 5:44:46 PM
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We who have been in batteries for awhile have also been bit by at least one thing or another. Another well-known battery company (I won't slander them here) had a supposed AA-size battery that the comapny boasted something like 15% greater capacity than any other competitor -- sure, until you discover that it had a larger diameter that gave it 15% more volume! When a few select customers complained, the company said the datasheet clearly shows the size, but would consider marking it differently than just plain 'AA'. They never made any change. Needless to say, the production run was short lived.

    Another bad experience, is with cheap-spring battery holders. I designed a project using Energizer's L91 ultimate lithium battery in a battery holder. The AA battery delivers quite a punch. In my prototype, I bought a spring battery holder from [R..io Sh..k], which had bright silvery-looking contacts and springs. In about 30 seconds or so, the plastic holder was melted and the circuit quit. Measuring the contact resistance with a good 4-wire ohm meter revealed the problem. Eleven watts dissipated on a tiny spot builds heat, and the hotter the contacts got, the higher the reisitance -- talk about thermal runaway. Since I didn't plan on using that battery holder in production anyway, it turned out OK, but I did check the production version before release.

IDontUseTheForumSoWhyAmIForc
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IDontUseTheForumSoWhyAmIForc   2/10/2014 11:38:45 AM
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Excellent information Ivan ... very informative



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