Hello there, I was wondering if i could charge my anker battery with a 87 watts macbook pro charger? I don’t know if this will damage the battery or not.
A higher wattage wall charger will not cause any problem if it is working properly. For example, if the input power of the battery is 5V/1A, even you use a higher wattage wall charger at 10W(5V/2A) or 18W(9V/2A), the battery will only accept 5V/1A in charging. It will not be overcharged.
Therefore, please rest assured that a MacBook charger will work properly with PowerCore Speed 20000 PD.