The term "FLO" on a battery charger typically stands for "float mode" or "float charge." Here are some detailed explanations regarding its significance and function:
Float Mode (FLO)
Purpose: The primary purpose of float mode is to maintain a battery at full charge without overcharging. This mode is often used for lead-acid batteries, including flooded, gel, and AGM (Absorbent Glass Mat) types.
Voltage Regulation: In float mode, the charger adjusts the voltage to a lower level compared to the bulk charge (or fast charge) phase. This lower voltage helps to keep the battery fully charged while minimizing the risk of gassing (where the electrolyte starts to bubble and release gases), which can reduce battery life.
Maintenance Charging: Float charging is ideal for batteries that are not in regular use but need to be kept charged. This is common for applications like backup power systems, emergency lighting, and vehicles that are stored for extended periods.
Reduces Sulfation: By keeping the battery in float mode, sulfation (the buildup of lead sulfate crystals on the battery plates) can be reduced. This is beneficial for extending the overall lifespan of the battery.
Automatic Transition: Many modern battery chargers automatically switch to float mode once the battery reaches its fully charged state. This allows for automatic maintenance without user intervention.
- Indicator Light or Signal: On some chargers, a "FLO" indicator light may illuminate to indicate that the charger is in float mode, showing that the battery is being maintained without the danger of overcharging.
Conclusion
In summary, "FLO" on a battery charger indicates that the charger is in float mode, which is used to maintain the battery at a fully charged state. This helps to prolong battery life, prevents overcharging, and ensures optimal performance when the battery is needed. If you’re using a charger with a "FLO" setting, it’s typically best suited for long-term battery maintenance.