Which is better, traditional battery charger or electronic charger? Better battery protection?

Each has its advantages and disadvantages, right?

The two chargers you mentioned have different ways to reduce the voltage. The former uses a transformer to isolate and reduce the voltage of 220v alternating current, and then charges the battery through a rectifier circuit. Its advantages are safety, stability, long service life and good effect, but its disadvantages are large volume and high cost. The latter is generally capacitive, and the voltage is reduced by charging and discharging the capacitor. Its advantages are simple circuit and low cost, but its disadvantages are unsafe, unstable and short service life with 220 volts AC.

You can choose which charger to use according to the advantages and disadvantages mentioned above and your actual situation. In terms of charging effect, there is little difference between the two chargers.

On the whole, I personally recommend the step-down transformer (traditional charger). The work is more stable and the service life is long. The most important thing is that the power is mainly determined by the oil-immersed transformer, so you can choose the charging power according to your battery capacity, and then choose the transformer power according to the charging power.