PASLODE IMPULSE IM250 II Cordless Finish Nailer 16 gauge 900400 works fine

PASLODE IMPULSE IM250 II Cordless Finish Nailer 16 gauge 900400 works fine. I've had this gun for over 20 years, works fine, operational, it shoots. And, I'm not a trim carpenter, so it didn't get used everyday. With partial box of nails.