One thing to think about is the power drain on a battery that is not being recharged
as the ignition is taking power away. The hotter these things are, are they going to
be hungrier and sap the battery dry?
The battery absolutely needs to be well maintained and charged. With the dwell properly set
average current draw will vary from 2 - 6 amps depending upon RPM.
So for a 30 amp hour Garden Tractor Battery battery, a fully charged battery would
last about 6 hours with the engine running at 8000 RPM. This assumes proper dwell
control.
This type of ignition is not for those too busy or too lazy to charge a battery between races or
to keep a spare fully charged battery on hand.
Bill