Hot shot 2 is a very reliable ignitor, and the battery is replaceable, the only way i found out is my savage decided to flip over whille i still had it connected and it "broke" the battery off the top of it. There is a setscrew that grounds the outter portion of the cell to the ignitor. If you want to replace the battery you just need to remove about 3/8" of the covering from the lower portion of the cell and presto you have a new cell in your hotshot.