Make sure you fully recharge it right away before drawing it back down again. 10.56 V is effectively a dead battery - 100% depth of discharge.
Most electrical devices will run on low voltage but will pull more current which can damage them.
Discharging a lead acid battery that much risks damage to the battery and reduction of its service life. That written if you don't do this more than a few times it may not make a significant reduction in usable life.
https://www.pveducat...-acid-batteries
Edited by ckent323, 06 September 2022 - 05:31 PM.