Used it to charge a brand new motorcycle battery after filling it up with acid.
Worked as expected, no surprise.
The old battery was bad, so it would not charge it because it would think the charge is finished as soon as it starts. But that's because the output impedance of a worn out battery is too high.
No problem charging a battery in good condition.
I really like the fact that you can choose the max current, display current / voltage / percentage, and the fact that there is a microcontroller to monitor things and act in case something unexpected happens.…plus