Thanks for that Derek - It's a 40AH battery so on that basis it should be ok.
If I leave the lights on the buzzer goes, so I should be ok. I think I made an
error trying to get the car thief proof (we used to live in a higher crime
area), with the LED disconnected there can't be a problem, so I may go that
route anyway. A flashing one appears (no pun intended) to use less, because
when I wired it through the meter it peaked at 28mA, but also went to zero, so
may use only 14mA ?
----- Original Message -----
From: Derek Clews
To: [email protected]
Sent: Wednesday, August 05, 2009 8:44 PM
Subject: [Quantum Owners] Re: Battery Drain
Martin,
Hi. 28 mA is 28 thousandths of an amp i.e. 0.028 Amp. Flowing each hour for
a week is 24x7= 168 hours. So you have 0.028 x 168 = 4.704 Amp Hours used up
by that item for your battery. Around 10 to 15% of a usual battery charge
depending on battery size.
A battery sitting there doing nothing can be expected to loose around 10%
charge in a month. So a week is fine from that point of view also.
My Q battery is 40 Amp Hours, so going by that if fully charged even a poor
battery should be OK.
Is that the only drain on the battery? If so, don't worry - just don't leave
the lights on..............
Regards
Derek
On 5 Aug 2009, at 19:36, Susan and Martin Scott wrote:
I was thinking in terms of battery drain when unable to charge eg if I
leave
the car for week at the airport whilst on holiday.
How long would it take for 28mA to drain the battery down to 50% or 12.2V
for instance? Sorry but whilst I'm able to understand simple circuits I'm
not an 'eleectronics' man.
----- Original Message -----
From: "Derek Clews" <[email protected]>
To: <[email protected]>
Sent: Wednesday, August 05, 2009 3:10 PM
Subject: [Quantum Owners] Re: Battery Drain
My handy text on batteries quotes:
12V batteries
100% Charge 12.6V
75% 12.4V
50% 12.2V
25% 12.0V
0% Flat 11.7V
This is Voltage across the terminals at rest (not under and load or 2
seconds after charging, so disconnect for a while if in doubt) with a
multimeter. i.e. the kind of test we can all do. I have found it to
be a good rule of thumb in practice. Of course, as they get older
batteries fail to hold charge so well and need replacing in time. But
a well used battery can last many times the life of a miss-used battery.
I use a multistage regulated charger for permanent attachment during
storage. I have a Ctec 3600 that has worked well for me for years and
is totally switch on and forget. There are bigger and smaller ones.
Demon Tweeks does them with 10% discount for members:
http://www.demon-tweeks.co.uk/products/search.asp?keyword=battery+charger&classCode=MSPORT&brandCode=all&x=23&y=15&page=4&filterBrandCode=B131&OrderBy=
Either that or run the car for half an hour plus every week, if you
don't want to say 'bye bye battery'.
Derek
On 5 Aug 2009, at 14:35, Jim Hearne wrote:
That was the answer, it depends how quickly and easily the car starts.
I'd guess, if the battery is reading below about 9 volts before you
try
to start the car it's not going to make it.
Jim
Susan and Martin Scott wrote:
My very question - how much is almost flat!
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Quantum Owners Group" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/quantumowners?hl=en
IMPORTANT NOTE: All information presented herewith is provided on an "As Is"
basis, without warranty or the implication thereof. Neither the Quantum Owners
Club nor the individuals associated with the Quantum Owners Club or in the
preparation of the above information shall have any liability to any person or
entity with respect to liability, loss, or damage caused or alleged to be
caused directly or indirectly by the instructions contained within this or
related message(s).
-~----------~----~----~----~------~----~------~--~---
