A recharge at a very low rate, accomplished by connection to a buss whose voltage is slightly higher than the open circuit voltage of the battery.
Float charging is charging at a relatively low voltage. It is applied after a full battery charge at normal (bulk) charge.
A format of charging mode. Battery will release capacity even when it is not in use. Float charging function supplies minimum voltage and current to maintain battery capacity on the full level when the battery is fully charged.
Method of recharging in which a secondary cell is continuously connected to a constant-voltage supply that maintains the cell in fully charged condition.
The battery charging mode for which sealed lead acid batteries are designed. The float voltage is the ideal maintenance voltage for the battery which maximizes battery life. When the float voltage is applied to a battery, a current known as the float current flows into the battery, exactly canceling the battery's own internal self-discharge current. Sealed lead acid batteries require float charging at least occasionally or they will become permanently degraded by a process called sulfation. Maximum lifetime is obtained when a sealed lead acid battery is permanently float charged.
Float Charging or Trickle charging is a common method of maintaining cells in a battery at an optimum preset Voltage, often after a more vigorous short-term Boost Charge has been employed to restore discharged or unequally charged cells to the maximum Surface Charge.