Because this is a 4-Amp charger, a rough estimate for charging time can be calculated by dividing the battery capacity (Ah) by 4.
The Selmar Turbo 4 is a compact multi-stage battery charger designed for 12 V lead-acid batteries (including flooded/wet, AGM, and gel) with a Turbo/boost mode for faster recharge and maintenance/float capability for long-term connection. This guide explains features, safety, installation, operation, troubleshooting, maintenance, and advanced tips to get the best performance and life from your battery and charger.
Lead-acid batteries can release explosive gases during charging. Always operate in a well-ventilated area. Terminal Care: selmar-turbo-4-battery-charger-instructions
If the charger becomes too hot, it may turn itself off. Allow it to cool down before resuming.
The ammeter on the front of the charger will indicate that charging is in progress. Because this is a 4-Amp charger, a rough
(a "moving arm" style) provides a visual representation of the current (Amps) flowing into the battery.
Unlike digital smart chargers that turn off automatically, the Selmar Turbo 4 Allow it to cool down before resuming
| Symptom | Probable Cause | Solution | | :--- | :--- | :--- | | | 1. Blown mains fuse. 2. Poor connection at battery terminals. 3. Internal thermal cutout tripped. | 1. Check wall socket and replace fuse. 2. Clean battery posts and tighten clamps. 3. Let charger cool down; press reset button if available. | | Ammeter needle goes backwards | Reverse polarity connection. | Stop immediately. The battery is connected backward (Red to Negative). Swap the clamps. | | Charger hums loudly / vibrates | Transformer laminates loose or internal short. | Stop use. This indicates an internal hardware failure. Service by a qualified technician is required. | | Clamps spark on connection | Battery voltage very low (dead short) or connecting to highly volatile terminals. | Ensure the charger switch is set to "OFF" or "0" before connecting. | | Battery won't hold charge | Sulfation or dead cell. | The Turbo 4 can sometimes recover sulfated batteries by charging at a low rate (Position 1) for 24 hours. If it still fails, the battery is likely dead. |
Follow this specific sequence to avoid sparks or electrical damage:
Connect the red (positive) crocodile clip to the positive (+) terminal of the battery.