How long a car battery will last without starting the engine depends on several factors, but here are some general guidelines:
Typical Car Battery (Lead-Acid):
-
2 to 4 weeks: A healthy car battery in a modern vehicle with electronics (alarm system, clock, ECU memory, etc.) may last this long without starting.
-
1 to 2 weeks: Older or weaker batteries, or cars with high parasitic drain (dash cams, GPS, etc.), may die quicker.
Lithium Car Starting Battery (like PROPOW):
-
2 to 3 months or more: Lithium batteries have a much lower self-discharge rate and can hold a charge longer when idle.
Key Influencing Factors:
-
Battery health – Older or weak batteries discharge faster.
-
Temperature – Cold weather drains batteries faster.
-
Parasitic drain – Electronics that draw power even when the car is off.
-
Battery type – AGM and lithium batteries last longer than flooded lead-acid ones.
-
How charged the battery is when left unused.
Tips to Prevent Battery Drain:
-
Start the car and let it run for 15–20 minutes every 1–2 weeks.
-
Disconnect the negative terminal if storing long-term.
-
Use a battery maintainer or trickle charger if parked for extended periods.
Post time: May-07-2025
