Recall that this is just a little battery, only 12 amp hours. And the
inverter starts complaining about low voltage when the battery gets to
12.6 volts. It can still keep on for quite a while but the chirping
from the inverter gets bothersome.
Looking back on my 5 year old test notes I see that the Schumacher 1.5
amp battery charger/maintainer never got the battery over 12.85 volts.
The 6 amp auto charger, however, it running them up to 13.5. That
should probably give me a lot of extra shooting life.
Chuck Norcutt
Ken Norton wrote:
> Chuck, that number of full-dump flashes just doesn't seem right to me. I
> know those inverters are pigs when it comes to "overhead" current draw, so
> maybe you might be running into a time-based discharge pattern when using
> the AB 800s.
> Of course, this is referring to "normal" usage, not your current problem
> with a battery on life support.
>
> I do plan on seeing how much oomph my deep cycle marine battery gives when
> powering a pair of monolights. I know it will keep a laptop computer alive
> for 20+ hours. Hmm... Actually, now that I think of it, we got at least 24
> computer hours (sometimes with two computers) and six hours of 18w compact
> florescent runtime and the battery voltage was still about 10V
>
> AG
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