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I have a few of these that might be in questionable condition, as I neglected them for some time.
I've used these for launch control batteries for model rocketry, and had even built a load tester for it, but my memory is rusty. I recently got a couple more batteries, and was wondering if my tester is still telling me good information.
just a simple voltmeter, with a button that adds a 40 watt load and measures the voltage. if I recall if the load voltage drops to 80% or less of the no-load voltage, the battery is starting to go bad.
or am I confusing the 80% DOD with something else?
batteries usage was approx 2 amps(24 watts) for about 1 second every minute for about 4-6 hours(so 0.04 watt hours?) , then sat on a dumb wall wart charger (c/10? c/12?) for a two week period between rocket launch events.
then forgotten for about 6 years in the back closet.
I'd like to know if the way i was testing was a good way to evaluate the batteries, or if there was something different to try
and i'd like to know if my math was right.
I've used these for launch control batteries for model rocketry, and had even built a load tester for it, but my memory is rusty. I recently got a couple more batteries, and was wondering if my tester is still telling me good information.
just a simple voltmeter, with a button that adds a 40 watt load and measures the voltage. if I recall if the load voltage drops to 80% or less of the no-load voltage, the battery is starting to go bad.
or am I confusing the 80% DOD with something else?
batteries usage was approx 2 amps(24 watts) for about 1 second every minute for about 4-6 hours(so 0.04 watt hours?) , then sat on a dumb wall wart charger (c/10? c/12?) for a two week period between rocket launch events.
then forgotten for about 6 years in the back closet.
I'd like to know if the way i was testing was a good way to evaluate the batteries, or if there was something different to try
and i'd like to know if my math was right.
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