The CTEK PRO25S battery charger user manual provides safety instructions, charging modes, operation steps, and technical specifications.
This manual explains the safety precautions for using the CTEK PRO25S charger, including warnings against charging frozen or damaged batteries, keeping the charger well‑ventilated, and using only original CTEK cables. It also details the required cable length (max 5 m) and proper grounding of the power plug.
The guide describes how to select charging modes with the MODE button, outlines the eight charging steps (de‑sulfation, soft‑start, fast charge, etc.), and lists the technical specifications such as input voltage, output current, reverse leakage current, ripple, operating temperature range, IP44 protection, and warranty period. This manual is written in Chinese.
| Input voltage | 220‑240 VAC, 50‑60 Hz |
|---|---|
| Maximum input current | 2.9 A |
| Output current | 25 A |
| Output voltage | 12 V |
| Reverse leakage current | < 2.3 Ah/month |
| Operating temperature range | -20 °C to +50 °C |
| IP protection rating | IP44 |
| Battery capacity range | 40‑500 Ah |
Press the MODE button; the charger will activate the selected mode within about two seconds.
Do not extend the charging cable beyond a total length of 5.0 meters.
Never charge frozen or damaged batteries, keep the charger well‑ventilated, and avoid placing the charger on top of the battery.