The Sears Security battery also has a battery-saver, so if you have a slow current drain, it will shut the battery off, keeping plenty of power to start your car when you return and reset the battery. This has saved me several times when I went a few weeks between driving the car. Between the anti-theft, long term storage (both via remote), and the saver, it's well worth the investment. IMPORTANT: If you buy one, be sure to get the accessory side mount posts, which they should include for free. -Hank #1619