I have a 6 volt 4.5 SLA battery.
I have been charging it for 10 hrs. at 500 ma.
The battery powers (2) 1000 lumen lights for my bicycle.
When I powered up the lights, they are pretty dim.
Is there a load test I can do to see if the battery is dead ?
is the bulb 6 V ?
see if you can measure the voltage with the bulb connected
that's as good of a load test as any
The bulbs are 4.5 volt, but I have a circuit that converts 6 volt to 4.5 volt.
Should I test the voltage going to the bulb ?
yes - see if it's 4.5 V
and measure the battery - both measurements with the bulb lit
maybe something wrong the the converter circuit
You are right.
The converter circuit was dead.
I will see if I can clean up the corrosion.
I live next to the Gulf of Mexico.
The salty environment is probably a killer to electronic circuits.
:-)
Andy
It turned out that the toggle switch was corroded.
The circuit still works fine.
I removed the switch and made the project box waterproof.
I have a feeling that moist air will still make it's way in. :-)
But it will have to work a lot harder.