The battery can easily perform a 10 to 15 minute demonstration of your boost converter circuit.
It should then be immediately recharged. Discharged LA batteries will quickly sulfate and become un-usable if not recharged promptly.
Just put a cheap multimeter on the battery to monitor voltage.
12.0 to 11.9 volts is about to 50% discharged. This is measured while loaded and delivering power to the circuit. The voltage will rebound when power drain stops and show a much higher voltage.
Don't be fooled, the battery is drained at this point and further discharge will physically damage the delicate lead lattice holding the active chemical compounds. Overcharging will physically damage them as well, but not as suddenly.
It should then be immediately recharged. Discharged LA batteries will quickly sulfate and become un-usable if not recharged promptly.
Just put a cheap multimeter on the battery to monitor voltage.
12.0 to 11.9 volts is about to 50% discharged. This is measured while loaded and delivering power to the circuit. The voltage will rebound when power drain stops and show a much higher voltage.
Don't be fooled, the battery is drained at this point and further discharge will physically damage the delicate lead lattice holding the active chemical compounds. Overcharging will physically damage them as well, but not as suddenly.