CTEK CT5 Time To Go Battery Charger and Maintainer

The CT5 Time To Go adds a countdown timer and start indicator that the MXS 5.0 lacks. The LED display shows an estimated time remaining to full charge, and it tells you when the battery has enough charge to start the vehicle · even before it reaches 100%. Both chargers output 4.3A for 12V batteries and share the Comfort Connect accessory system and 5-year warranty. The CT5 also has built-in temperature compensation that automatically adjusts charge voltage in extreme heat or cold. If you want to know when charging is done without checking a meter or guessing, the CT5 is the relevant upgrade.

The US listing (ASIN B07CWBY39W, model 40-255) confirms compatibility with standard 12V flooded lead-acid (FLA) and 12V AGM batteries. A dedicated AGM Mode sets optimized absorption and float voltages specifically for AGM batteries. GEL battery compatibility is not claimed in the US listing · do not assume it is supported. LiFePO4 (lithium) batteries are also not claimed in any feature bullet or spec table; the CT5 does not have a lithium mode. The charger is 12V only · it does not support 6V batteries.

Yes · the CT5 uses a float maintenance mode designed for long-term connection without overcharge. Community users confirm it for months-long winter storage on cars, motorcycles, and mowers. The listing states it is designed to 'not damage electronic systems' with 'no overcharge or undercharge ever.' CTEK's typical float voltage for 12V chargers is around 13.6V · within the correct 13.2·13.8V range for lead-acid and AGM batteries · but the specific float voltage for the CT5 has not been independently community-measured and cited for this unit.

No UL Listed or ETL Certified mark was found for the CTEK CT5 Time To Go (ASIN B07CWBY39W) at the time of this review. CTEK is a Swedish brand and the CT5 carries CE marking · a European conformity declaration that is a manufacturer self-declaration, not independently tested to US UL or ETL standards. This is the same certification posture as the sibling CTEK MXS 5.0. If a UL-listed or ETL-certified charger is required for your application, alternatives include the NOCO Genius series (UL Listed) or Battery Tender Plus (ETL Certified).

Yes. The listing explicitly names a Reconditioning Mode that 'restores stratified and deeply discharged batteries, excellent for Powersport vehicles that have been in storage for long periods of time,' and a Patented Desulfation Function that 'analyzes the state of the battery and, if possible, recovers the battery and its power.' Both are confirmed in the feature bullets, not just marketing copy.

No. As of June 1, 2026, no active CPSC recall was found for the CTEK CT5 Time To Go battery charger (model 40-255).