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The charger for iron phosphate lithium-ion batteries is different from that of regular lithium-ion batteries. The maximum termination charging voltage of lithium-ion batteries is 4.2 volts; Lithium iron phosphate batteries have a voltage of 3.65 volts. The safe working voltage range of lithium batteries is 2.8-4.2V. If the voltage is lower or higher than this range, the lithium ions in the battery become very unstable and even cause accidents. To ensure the safety of lithium iron phosphate batteries, specialized chargers are required. These chargers will automatically adjust the charging method based on the current state of the battery.
It is recommended to use CCCV charging method for charging lithium iron phosphate batteries, which means constant current first and then constant voltage. The recommended constant current is 0.3C. Constant voltage recommendation 3.65. During the constant current process, charge with a current of 0.3C. When the battery voltage reaches 3.65V, use a constant voltage of 3.65V for charging. Stop charging when the charging current is below 0.1C (or 0.05C), indicating that the battery is fully charged.
When charging, it is best to choose a dedicated charger from the original factory, otherwise it will affect or damage the lithium iron phosphate battery.
To prevent charging at excessively high temperatures, if a lithium iron phosphate battery is used in an environment above the specified operating temperature of 35C, the battery's charge will continuously decrease, meaning that the battery's power supply time will not be as long as usual.
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