Easy to understand: countdown display to tell you when the battery is charged and ready to go Simple to connect and easy to use: fully automatic, spark free, Reverse polarity protected Tough and reliable: designed for outdoor use in even the most extreme temperatures. Developed and tested in Sweden Flexible: compatible with many different types of lead-acid vehicle batteries Effective: restores battery life and reconditions flat batteries. Maintains: ideal for carefree long-term maintenance charging Only charger on the market that can tell you when your battery will be ready for use Indicators that tell you when you can safely TRY to start your vehicle and when the battery is ready to GO. The CT5 TIME TO GO charger is completely safe connected 24/7 all year round keeping your battery in tip top condition The unique CTEK feature TIME TO GO allows you to stay in control and plan your day Can even repair a discharged battery if you happen to leave it unattended.