I wrote the whole thing trying to hang onto a 10 week old puppy so that’s where it’s kind of messed up. I apologize for that. The only thing I tried it on was lead acid batteries and it told me how much was left. How good the battery was how many volts, it went through a whole thing so the charger I think works it’s just doesn’t communicate With the lithium ion battery I have a friend that’s has a load tester so I can get tested, but the charger doesn’t even recognize the battery. I’ve sent an email to LiTime the battery company. I sent a text. I’ve made a phone call and I tried a chat. Nobody would Respond. The only setting is 10% 30% 50% 90% 100% like that. And no instructions with the battery any help I appreciate it.