>Have you given any thought to these new Bolder thin metal film
>batteries? See them at www.boldertmf.com. They are the size of a
>grapefruit and put out 350 amps for starting but have limited amp hour
>capacity (1 Amp for two hours, 50 amps for 85 sec).
>I have considered using one as a starting power source but I
>would also like to have an adequate dual battery setup for a
>dual electronic ignition.
These batteries have been around in various forms
for about two years at least. Bill had an array of
the little "jelly-roll" batteries in his shop just
before OSH 97. He demonstrated a 300 amp dump
ability for enough time to get an engine started.
I looked at the Bolder batteries and they don't
show a cell connection worthy of hundreds of amps
current flow. Bill's battery had welded intercell
connectors and soft, braided lead wires to attach
the battery into a system.
Bill's interest in this product was to offer a light
weight battery good for one start to airshow performers
who like to leave their big battery on the ground during
a show but might need to start the engine after
a stopage in flight.
>What do you think of the combination of an 18 AH motorcycle
>battery and the bolder battery, switchable so that either
>battery can power either ignition? Do you think that's
>too dicey with the limited AH capacity of the Bolder battery?
Don't see the advantage of this combination. There are
lots of 18 a.h. batteries that will crank an engine
very handily without the assitance of the 2 a.h. Bolder
battery (or it's market equal). If you were going to
install a 2 a.h. battery as a short-term backup
for ignition only, then there are some much less expensive
devices that could be used since you don't need
cranking capability from the little guy.
For dual electronic ignition, I think I'd still recommend
a pair of equal sized batteries with one battery a year
shuffle as I've described in my articles. If you want to
get weight down, how about a pair of 10 or 12 a.h. batteries
used together for cranking? A pair of 10's would be about
the same weight as the 18 and 2 combo you were proposing
and cost less to maintain.
Bob . . .
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(o o)
< A mind abhors a vacuum . . . >
< When deprived of facts, >
< our fantasies are generally >
< much worse than reality. >
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