Yes, airpods can be charged with 20w charging head, but it will have some damage to the earphone battery, and it is not recommended that users use 20w fast charging head to charge airpods.
Airpods use high-performance lithium-ion batteries, both earphones and charging pods have built-in power management chips, which can automatically identify charging voltage and current, select the most appropriate charging power, both to meet the needs of fast recharge, and take into account the service life! In addition, the built-in power management chip and algorithm can also optimize the charging method according to the use of habits.