CTEK CS ONE Gen 2 Smart Battery Charger with WiFi
- 12V batteries, including lithium (LiFePO4)
- 1.8 A charging current
- Polarity-free clamps, either terminal
- WiFi and Bluetooth app for remote monitoring
- Safe to leave connected for maintenance
- CE and UL listed
Updated 20 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A smart, set-and-forget maintainer for cars and motorcycles that sit, with app monitoring and clamps you cannot connect backwards. The low current makes it slow on a deeply drained car battery.
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ASIN: B0GH2NT2T4Category: Car Battery Chargers
Overview
Not a high-output booster, the CTEK CS ONE is a smart charger and maintainer for car and motorcycle batteries that adapts its program to the battery automatically. The clamps work on either terminal, and WiFi and Bluetooth let you watch charging from a phone.
Adaptive charging, lithium support and reverse-proof clamps take the guesswork out of battery care. The current is modest, so it suits maintenance and slow charging more than quick recovery.
Who it's for
Owners of weekend cars, bikes and seasonal vehicles will leave it connected all winter. Those who need jump power or fast charging should look at a higher-amp unit or jump starter.
Pros and cons
- Adapts to any 12V battery
- Supports lithium LiFePO4
- Clamps cannot be reversed
- Remote app monitoring
- Low charge current
- Full charge time not listed
- Warranty not listed
Performance notes
The charger reads the battery and adjusts its program, which is how one unit handles lead-acid and lithium. Low current is gentle for long maintenance, but it takes many hours to refill a large, flat battery.
Specifications
| Brand | CTEK |
|---|---|
| Dimensions & fit | |
| Item Dimensions D x W x H | 9.8 × 3.1 × 3.9 inches |
| Capacity & performance | |
| Output Voltage | 12 volts |
| Power & efficiency | |
| Amperage | 1.8 amps |
| Improve Battery Life | Extend battery lifetime by up to 3 times through regular charging |
| Construction & materials | |
| Color | Black |
| Compatibility & installation | |
| Connectivity | WiFi, Bluetooth App |
| Compatible Devices | 12V batteries, including lithium |
| Seamless Connectivity | Wi-Fi and Bluetooth-enabled app for additional features and insights |
| Other details | |
| Connector Type Used on Cable | Alligator Clips, Polarity-Free |
| Specification Met | CE, UL |
| Connect & Forget | Can be left safely connected for long periods during maintenance charging |
| Polarity-Free | The clamps can be safely connected to either charging terminal when charging |
Frequently asked questions
Can the CTEK CS ONE charge a lithium battery?
Yes. It adapts to any 12V battery, including lithium LiFePO4.
Can I leave it connected all winter?
Yes. The listing says it can be left safely connected for long periods during maintenance charging.
Is it a jump starter?
No. It is a charger and maintainer with no jump-start function.