A miscellany of useful links relating to many aspects of lead Acid 
batteries.
I have vetted these so most are there because they appeared to 
(probably) have some potential value.

Below:

    LAB = Lead Acid Battery.
    SLA = Sealed Lead Acid (battery)

        I may use these terms somewhat interchangeably
        (even though they aren't strictly equivalent).

____________________

Excellent comment on charging small SLAs

        http://www.batteryuniversity.com/partone-13.htm

Wikipedia
General

        http://en.wikipedia.org/wiki/Lead-acid_battery

"Battery university"
Good stuff on many battery types
Good enough to be worth at least skim reading the entire technical 
content.
Lots of inobvious material - eg why NiCd may be superior to NimH in 
some applications with suitable care - and what the requisite care is.

    http://www.batteryuniversity.com/index.htm

    Charging the LAB

        http://www.batteryuniversity.com/partone-13.htm



______________

Some technical details on LA batteries
Good

        http://www.shaka.com/~kalepa/technotes.htm

    Excellent power sonic LAB manual referred to on his page.
    His link is broken.
    Excellent data source - well worth looking at.

        http://www.power-sonic.com/techman.pdf

- - - - - -
DESULPHATION:

LAB desulphation pulse generator
There is much myth and hype in the battery desulphation area BUT this
does sound worthwhile.
There is good technical reason to think that some methods will work
(and good reason to think that many don't).

There is a bit more to the following than just "pulse it and it
works".
They look (in some cases) for a resonant frequency (which *may* be a
meaningful thing to do) and say they can detect progress by watching
peak voltage.
Bears looking at.

        http://www.shaka.com/~kalepa/desulf.htm

        Related patent
        (Having a patent doesn't make it work - or not)
            http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1=3963976.WKU.&OS=PN/3963976&RS=PN/3963976


Low power Desulphator
Worth looking at

        http://www.shaka.com/~kalepa/lowpower.htm


    555 based CCTs
            http://www.shaka.com/~kalepa/n_channel_schem.gif
            http://www.shaka.com/~kalepa/556alternate.gif
           http://www.shaka.com/~kalepa/trevorandrews.gif

    1 transistor
        http://www.shaka.com/~kalepa/trevorandrews2.gif

    King Kong 200A pulse version
    Offline, no isolation, fatal, death, yada yada

        http://www.shaka.com/~kalepa/highpower.htm
___________________________

YALABC

        http://www.uoguelph.ca/~antoon/gadgets/labc2.htm


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