Hi,
I found a Varta for 12€. That's about
$14.50 and I think the trickle charger I
have in the garage will do. If not I
have a friend in the village who can
charge anything. He's the local
electrical contractor. Thanks for the
help. It was pointed out to me by a
friend in San Jose, when we talked on
Skype last night, that the mains are far
more likely to fail while there is a
cleaning tool in the works than a new
set of batteries.
Cory Papenfuss wrote:
Thanks. That's everything I need to know. If I can't find a decent
6.5V supply I'll get a lead acid accumulator. I bought one some time
ago for another application and its been working very well for more
than a year. I can charge it in the other device. I'd forgotten about
this.
I would like to also add one more thing about lead acid. They're
quite inexpensive and have good power density and reasonable energy
density (per volume anyway... they're plenty heavy). Unlike NiMH and
NiCd, however, you CANNOT leave them dead for any length of time. When
they're completely dead, compounds precipitate out of "solution" and
prematurely kill the battery.... it only takes a day or so to kill one
if left dead.
Not to be worried about it or anything, and they don't have to be
full... just not completely flat. They've got a MUCH longer shelf life
than NiMH... it's 3% *per month*
-Cory
--
Dr E D F Williams
_______________________________
http://personal.inet.fi/cool/don.williams
See feature: The Cement Company from Hell
Updated: Photomicro Link -- 18 05 2005
