What is the Voltage of a 12V battery after a Week Without Starting

Can a 12-volt battery lose voltage after not starting a car for a week? You bet it can!

BU-403: Charging Lead Acid - Battery University

12V Battery Low Voltage Cut Off Switch On Protection Undervoltage Controller Under-Voltage Control : Patio, Lawn & Garden

And my 12V battery is down as well, dealership issues

What's going on here? Voltage is 13.3 when disconnected and 2.6 when connected. Classic car will not start. : r/MechanicAdvice

ExpertPower 12V 5Ah Lithium LiFePO4 Deep Cycle Rechargeable Battery, 2500-7000 Life Cycles & 10-Year Lifetime

Low voltage situations & weak batteries: Bane of German cars

The Basics of Charging LiFePO4 Batteries

My car died this morning. When does high-voltage battery charge 12 volt batteries?

Under-Load Battery Voltage vs. SoC - Marine How To

12v battery dead - need roadside assistance?

What car battery voltage is too low? - Quora