Battery charger CS FREE 12V 5/20A 40-462
Index: 40-462
Battery charger CS FREE, charging voltage: 12 V, charging current: 5/20A, power supply: 230V, battery type: AGM/Ca/EFB/GEL/LiFePO4/MF/WET
CTEK CS FREE
12V | Portable solution for emergency starting and battery charging

CS FREE is a multifunctional device that replaces traditional jump starters and battery chargers. It allows for safe and quick starting of a discharged battery without the risk of damaging the vehicle's electronics.
- Safe emergency starting (Adaptive Boost): forget about jumper cables and boosters. CS FREE safely and effectively starts your vehicle with a discharged battery.
- Charging and maintenance: CS FREE keeps your battery in optimal condition, whether you are connected to the power grid or in the field. The device allows charging and maintenance of any 12V lead-acid or lithium battery using the power grid, solar panel, or an additional battery.
- Hi-Tech Power Bank: CS FREE is not only a device for vehicles but also a high-class power bank that allows charging USB devices at any time.
- Universal solution for emergency starting and maintaining vehicle batteries in excellent condition.
- Adaptive Boost technology replaces jump starters and boosters, providing the safest way to start a discharged battery.
- Connect the device to the power grid, and CS FREE becomes a smart 5A battery charger.
- Charge and maintain any 12V lead-acid or lithium battery using the power grid, solar panel, or separate service battery.
PACKAGE CONTENTS
The package includes a mains charging block, USB-C cable, crocodile clamps for battery connection
PRODUCT FEATURES
- Easy to use, with a clear display
- No need to select modes - just connect the device, and CS FREE will take care of the rest
- The countdown function informs you when the battery will have enough energy to start the vehicle and the remaining time to full charge
- The built-in battery can remain fully charged for up to a year, ensuring the device is always ready for use
- Equipped with USB-C and USB-A ports for charging devices such as laptops, smartphones, and tablets
- Modern design in a solid and durable housing
UNBOXING
HOW TO CONNECT
TECHNICAL DATA
| Charging category | AC and DC charging |
| Input voltage | USB-C, 5 VDC – 25 VDC, 3 ADC/60 W max |
| Output voltage | 12 V, 20 A/240 W max |
| Battery type | Lead-acid; Lithium-ion |
| Battery types | 12 V: WET; MF; Ca/Ca; AGM; EFB; GEL; LiFePO₄ |
| Battery capacity | 10-130 Ah |
| Battery capacity CEC-400 | 10-130 Ah |
| Battery voltage | 12 V |
| Ambient temperature during storage | -20 ˚C to +45 ˚C |
| Ambient temperature during operation | -20 ˚C to +50 ˚C |
| Cooling | natural convection |
| Initial voltage | 3.0 V |
| Frequency | 50-60 Hz |
| Housing material | Plastic |
| Rated voltage (input) | 100 VAC – 240 VAC |
| Protection degree | IP54 |
| Dimensions (L x W x H) | 248 x 98 x 78 mm |
| Net weight (unit with cables) | 1.4 kg |
| Internal battery capacity | 66 Wh |
| Chemical composition of internal battery cells | Lithium-ion polymer |
| Internal battery charging temperature | 0˚C to +45˚C |
| Internal battery discharging temperature | -20 ˚C to +50 ˚C |
| Internal battery lifespan | 300 cycles, 80% |
| Internal battery durability | 1 year |
| Power adapter cable length | 1 m |
| Power adapter cable type | USB-C |
| Power adapter input | 100 VAC – 240 VAC, 50 Hz – 60 Hz, max. 60 W |
| Power adapter output | USB-C, 5 VDC – 20 VDC, 3 ADC, max. 60 W |
| USB-A output | 5 VDC, 2.4 ADC/12 W max |
| USB-C output | 5 VDC, 9 VDC, 12 VDC, 15 VDC, 20 VDC, 3 ADC/60 W max. |
| Warranty | 2 years |
Description
CTEK CS FREE
12V | Portable solution for emergency starting and battery charging

CS FREE is a multifunctional device that replaces traditional jump starters and battery chargers. It allows for safe and quick starting of a discharged battery without the risk of damaging the vehicle's electronics.
- Safe emergency starting (Adaptive Boost): forget about jumper cables and boosters. CS FREE safely and effectively starts your vehicle with a discharged battery.
- Charging and maintenance: CS FREE keeps your battery in optimal condition, whether you are connected to the power grid or in the field. The device allows charging and maintenance of any 12V lead-acid or lithium battery using the power grid, solar panel, or an additional battery.
- Hi-Tech Power Bank: CS FREE is not only a device for vehicles but also a high-class power bank that allows charging USB devices at any time.
- Universal solution for emergency starting and maintaining vehicle batteries in excellent condition.
- Adaptive Boost technology replaces jump starters and boosters, providing the safest way to start a discharged battery.
- Connect the device to the power grid, and CS FREE becomes a smart 5A battery charger.
- Charge and maintain any 12V lead-acid or lithium battery using the power grid, solar panel, or separate service battery.
PACKAGE CONTENTS
The package includes a mains charging block, USB-C cable, crocodile clamps for battery connection
PRODUCT FEATURES
- Easy to use, with a clear display
- No need to select modes - just connect the device, and CS FREE will take care of the rest
- The countdown function informs you when the battery will have enough energy to start the vehicle and the remaining time to full charge
- The built-in battery can remain fully charged for up to a year, ensuring the device is always ready for use
- Equipped with USB-C and USB-A ports for charging devices such as laptops, smartphones, and tablets
- Modern design in a solid and durable housing
UNBOXING
HOW TO CONNECT
TECHNICAL DATA
| Charging category | AC and DC charging |
| Input voltage | USB-C, 5 VDC – 25 VDC, 3 ADC/60 W max |
| Output voltage | 12 V, 20 A/240 W max |
| Battery type | Lead-acid; Lithium-ion |
| Battery types | 12 V: WET; MF; Ca/Ca; AGM; EFB; GEL; LiFePO₄ |
| Battery capacity | 10-130 Ah |
| Battery capacity CEC-400 | 10-130 Ah |
| Battery voltage | 12 V |
| Ambient temperature during storage | -20 ˚C to +45 ˚C |
| Ambient temperature during operation | -20 ˚C to +50 ˚C |
| Cooling | natural convection |
| Initial voltage | 3.0 V |
| Frequency | 50-60 Hz |
| Housing material | Plastic |
| Rated voltage (input) | 100 VAC – 240 VAC |
| Protection degree | IP54 |
| Dimensions (L x W x H) | 248 x 98 x 78 mm |
| Net weight (unit with cables) | 1.4 kg |
| Internal battery capacity | 66 Wh |
| Chemical composition of internal battery cells | Lithium-ion polymer |
| Internal battery charging temperature | 0˚C to +45˚C |
| Internal battery discharging temperature | -20 ˚C to +50 ˚C |
| Internal battery lifespan | 300 cycles, 80% |
| Internal battery durability | 1 year |
| Power adapter cable length | 1 m |
| Power adapter cable type | USB-C |
| Power adapter input | 100 VAC – 240 VAC, 50 Hz – 60 Hz, max. 60 W |
| Power adapter output | USB-C, 5 VDC – 20 VDC, 3 ADC, max. 60 W |
| USB-A output | 5 VDC, 2.4 ADC/12 W max |
| USB-C output | 5 VDC, 9 VDC, 12 VDC, 15 VDC, 20 VDC, 3 ADC/60 W max. |
| Warranty | 2 years |
Technical specification
20.0A
5.0A20.0A
5.0A20.0A
5.0AAGM
Ca
EFB
GEL
LiFePO4
MF
WETbattery overcharge
overheating
reversed polarization
short circuit
sparking