charges as expected and the ads are useful. I'm not sure what method it uses to detect bad batteries, but there's an indicator for that too that I haven't tested yet. Totally satisfied for the price.
Pros
ETL Safety Certificate and 100% Satisfaction Floating Charger - ETL, CE, FCC, RoHS Certificates, 1 Year Quality Guarantee, Hassle Free Return or Refund if there is any problem with the product, 24/7 Customer Service, Free Worries you have when buying this car charger.