Ordered this model a few years ago (warranty expired) and found a few disappointing features.1. The air cartridge did not provide a good seal for the tire valve stems2. After replacing the CR2450 battery a couple of times and checking the voltage of the (second) battery 3 weeks later, it was discovered that the batteries were being drained through internal circuitry. (with the block switched off). 0.5 volts dropped. > I figured that with such a drain on the battery, this block wouldn't last at all3. This was purchased for personal home use and only used a few times a year.4. Finally decided to replace this device with another manufacturer. I'm wondering if anyone else has gone through this with an earlier version of this 3018 model? Therefore, for me, this block is unreliable and useless, and I decided to throw it in the trash. Having not visited this review site since my original purchase, I noticed that Astro had made some changes to their design. I hope the issues I mentioned have been resolved. I paid a lot of money for this device and suffered losses. Thank you for reading this review.