Sadly this doesn't work. I connected to my new 230ah LiTime Lithium battery that was showing 13.25 volts on my multimeter. Stayed on standby. Their YoUtube video suggested I try force mode so I did that 6Xs. Just went back to standby every time. Tried on a AGM 12 volt battery i have that was showing 12.5 volts. Nothing. Tried reset by unplugging and just went back to standby again. Checked twice that the connection was secure. Nothing. Very disappointed.- UPDATE - Returned via 麻豆区, Ordered a new one and it works great