A LiPo / Li-ion charger is a device designed to safely recharge lithium-based batteries

It controls the charging process to prevent overheating and overcharging

Most chargers use a constant-current and constant-voltage method to protect the battery

During the first stage, the charger supplies a steady current to raise the battery voltage

Once the battery approaches its maximum voltage, the charger switches to constant-voltage mode

In this stage, the current gradually decreases as the battery becomes full

Typical Li-ion and LiPo cells are charged up to about 4.2 volts per cell

Good chargers include safety features such as short-circuit protection and thermal monitoring

Some models also provide cell balancing for multi-cell battery packs

Overall, a LiPo / Li-ion charger ensures efficient and safe charging for modern rechargeable batteries