On 2/11/2013 11:32 AM, Ken Norton wrote:
>> It was me who has an issue with the battery life, and it wasn't the
>> swapping during the day but when on the road charging more than two
>> batteries a day is a pain, although I suppose its possible to carry two
>> charges. For most users I am sure it is a non issue
> I would agree with you that for most users in most circumstances, it
> really is a non-issue. But I think in terms of me and my
> circumstances. <skip lengthy natter about details>
> So, circling back around...
>
> Five hours of camera run-time per day. One hour of available charge
> time per day.
Huh?
> Just how many batteries will I need if I'm out for five days?
The answer to your particular issue is an auxiliary battery. Could do it
yourself with a sealed led-acid, cord and plug
to a 12v outlet in the car and high efficiency converter. Or, get one of those
batteries packaged as an emergency
starter, that also has USB, inverter and 110 v outlets built into the case.
I have this problem with our little RV.
We most often camp in parks with no power. It has a good sized, deep-cycle aux.
battery, but on a typical cooler night,
I need all that power for other things, even after switching halogen lights to
LCD. Also, the built-in inverter uses
over twice the current as the smaller, more efficient one I have - and I've
been too lazy to install additional 12v
outlets. So I charge things off the main vehicle battery overnight. Usually,
some stuff is charged by bed time, and
anything else is charged by the time I get up to pee, and I unplug the
inverter. The total power draw amounts to nothing
from a fully charged vehicle battery.
We almost always go somewhere during the day, and 15-20 minutes of driving
fully charges both batteries. Indispensable
is a digital meter and chart of-no load voltages corresponding to % of charge.
The relationship is FAR from linear. I
use a dedicated meter that plugs into the 12v outlet.
Charged Up Moose
--
What if the Hokey Pokey *IS* what it's all about?
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