Does this watch's band have a quick release pin system?

Yes it does. The holes for the spring pins are "blind," meaning they do not go through the "ears" on the watch case through to the outside. For the record, I would not call spring pins "a quick release system." As likely as not when I change a watch band held in place with spring pins I struggle to get the precision screwdriver on the compression part of the spring, and sometimes I manage to launch the pins across the room when the screwdriver slips.

How long does the battery last?

Thank you for this inquiry. Depending on the usage of the watch, the battery could last up to 9.4 years. For further assistance or questions, please call our customer service center at 800-448-4639.

What size is the strap so i know what to buy as a replacement? I am getting the all black one but can not wear leather so i need an all nylon

Thank you for your question! You may replace the band for this watch with 20mm lug width size strap. For further assistance or questions, you may call our customer service center at 800-448-4639.

What size pins should i get i lost one

The watch I purchased has a 20 mm watch band. I would look for pins somewhere close to that size. I don’t know if the pins are listed according to band width or not, but that is the width of the band.