"David Hansen" wrote in message
...
On Fri, 9 Oct 2009 15:05:18 +0100 someone who may be "Fredxx"
wrote this:-

Lead-acid batteries are best left being trickle charged. Of course
that implies that the charger is capable of doing that, which many
cheap ones are not.

Ouch no!! That's the best way of wrecking a lead acid battery, especially
if the sealed types. Any current after it's fully charged will dry out a
battery.

I have been charging a set of sealed lead acid batteries in that way
for the best part of a decade. So far they remain fine. Obviously if
the charging voltage is set too high then it would indeed dry out
the battery, but I did a lot of research before deciding on that
form of charging to get the charging voltage right.

http://www.atbatt.com/sku_pdf/cyclon_application_manual.pdf



I can't see any mention of trickle charging. Float charging and constant
voltage charging are all that are mentioned or recommended.

You mix "trickle charging" with "charging voltage" in the same paragraph,
which suggests that your success in charging lead acid batteries has perhaps
been more by accident rather than through knowledge.