After around 800 splices I’ve had no problems.I was running a fujikura 60s and I kept getting error screens after I paid $720 on having it serviced. I didn’t have 10 k to wrap up in a 90s so I took a chance on the AI-9. I’m extremely happy. It’s fast and the battery has no problem doing over 144 splices and shrinks. . I can do 20 minute dozens. I get good splice readings 99% of the time .00-.01 and the ODTR hasn’t sent me back to do any reburns.