Garmin Zumo XT GPS And Anker PowerCore III 10K Model A1247 Power Bank

[JAS]

I want to use my Garmin Zumo XT GPS on my e-bike. I will connect it to an Anker PowerCore III 10K Model A1247 power bank. The capacity is 10000mAh 3.7 Vdc/37W.

How much longer can I use my Garmin Zumo XT when connected to the Anker power bank?

It looks like the Garmin Zumo XT internal battery is 3.7 Vdc and 1100 mAh.

 

[scalpel_ninja]

Theoretically 9 times longer? The external pack is slightly over 9 times the capacity of the internal battery. Factoring loss to heat, inefficiency of components and connection, maybe realistically 7-8 times longer.