As I understand it, there was (still is? I know they still make A sized rechargeables) A sizes, possibly B sizes, but they mainly used them for old radio sets and they had to have several different sizes and voltages. This was back when the radios had all sorts of various things on them and were large. I can't find any info on them really right now, but I am pretty sure they used to make B size too. As I'm sure you know, 123 is 2/3A, so it only makes sense that there was an A size to begin with.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Evan: Early portable radios had an "A" battery that ran the filaments and a 45 volt "B" battery for the plate voltage. Manufacturers may have skipped "B" as a cell size to avoid confusion.
Anybody got an early SEARS catalogue? Maybe there are clues in there.<HR></BLOCKQUOTE>
When I was a kid in 1953, I had an RCA vacuum tube portable radio, and as I remember, the "B" battery was about 2" wide x 1" thick x about 9 or 10" long. [img]images/icons/shocked.gif[/img]
-and yes, an "A" cell that was a little longer than a 123.
"A" size cells look like fat "AA" cells. I have had battery packs for my ham radios that used "A" cells. They're nice because they have a much higher current capacity, but nowadays the "AA" NiMH cells have the same or higher capacity as the old "A" NiCd cells.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by JollyRoger: Know where you can get A cells? And what voltage are they? 1.5V or 3V?
I might have the perfect mod that could use these...
OK, found this with a quick search...
and these, too! http://www.mbi.panasonic.co.jp/oemba...enmh/160ae.htm
Those HHR160s are the 2/3 "A"
size NimH, and are similar to the ones B.G.Micro has, except that their NimHs in that size is rated @ 800mAh-$1.19ea. (surplus-made in Japan)
I use 'em and they work great for space-saving applications.
Sanyo sells A NiMH cells that are rated at 2450 mAh minimum, 2700 mAh typical.
4/3 A cells are marketed at 3800 mAh. American Science and surplus sells approximately 3000 mAh mismatched 4/3 A NiMH cells cheaply. These cells show a much lower voltage drop under high load than the A cells.
The Sanyo A cells are occasionally sold in surplus laptop battery 7.2V packs auctions. I've posted auction links on CPF in prior months. Industrial Liquidators occasionally sells them in batches of 10 packs which can be broken donwn into individual cells that will fit into Energizer DB flashlights.
Auctions for 10 2100 mAh 7.2 Packs (that's 60 batteries) ran for $25 to $28 on EBAY, but I only interested one or two CPF'ers to bid. I was able to get 2450 mAh packs from Industrial Liquidators' local office. I have 16 unbroken packs left that I am ganging in various project lights I've discussed.
i have some 4/5 a cells.
about a 1/4 in shorter than a aa or an a cell.
i have found these perform better at high load than the sub c nicads they replace in my power screwdrivers.
btw i have these listed in buy sell trade if you need some.
i can get some photos of a b and c radio batts if you want to see em.
An alkaline A is still available. It is the Duracell Procell PC12A. It is intended as a substitute for a mercury A. Mercury A's were slighty smaller(about 1mm) then c-z A's. By the way, there is often confusion about the terms A,B,C etc. batteries. In the past there were A,B, and C radio batteries and A,B,C etc. dry cells. The two groups are unrelated. A radio batteries were used to heat the vacuum tube filaments in early radios. The earliest radios often used 6 volt car batteries, while compact portables of the 40's and 50's often used multiple C or D cells as their A batteries. B radio batteries are high voltage, most commonly 22.5 45, 67.5 or 90 volts. Eveready still makes several sizes of them. On the other hand, B cells are size used in 4.5 volt European bike-light and flashlight batteries.
Batteries Plus in San Diego says that the only alkaline A cell they currently carry is the 4.5 V Excell A21. It sells for $10.99 @ and replaces the Panasonic PX21, the Energizer EN133A and the Duracell PC133A. They can't provide any capacity or voltage drop specs.
At this price, I'm not as excited as I first was. I fear that it has three separate cells inside each of which have no more than an N cell. What can you tell us about this cell?
Catdaddy: what you have is not a single A battery. A single A has a single cell of 1.2 to 1.5 volts(3.0 or 3.6 for lithum). The battery you have is a stack of three button cells. the size of one of these cells often being referred to as a #1 or R50. The capacity should be far greater than using 3 of the commmon R44 button cells, but less than the 123A, AA combination.