12-08-2019 02:57 AM
I saw for earlier series aftermarket external batteries 4500mA/h.
the mounting is supposedly dirt/dust proof...as the charging port is exposed, I'm not sure about water resistance.
one normal GoPro battery is 1220mA/h.
I have four, all GoPro8 batteries - with the high current capability.
and I carry all with me.
with or without the dual charger and a slim power bank to charge a pair of batteries in the meantime.
in this way, I have more than that 4h the external battery can give you...
If the change of the battery is not a problem for you, I think it is a better idea.