The maximum discharge voltage for a lead-acid battery typically varies based on the type and design, but for a
12V lead-acid battery, the typical discharge voltage is around
10.5V to 11V. Below this, the battery is considered discharged and should not be drained further, as discharging it below 10.5V can lead to damage and a reduction in battery life.
For other types of lead-acid batteries, like 6V batteries or those used in industrial settings, the discharge voltage will differ accordingly. For instance, a
6V lead-acid battery would generally be considered discharged when it reaches
5.25V to 5.5V.
If you're using a lead-acid battery in an application where voltage levels are crucial, it's essential to consult the manufacturer's specifications for the exact voltage limits.