Purpose is to recharge my smart watch on multi-day tramping excursions.  4 - 5 charges per trip.  I'll pack whatever I get carefully but a tramping pack, is a tramping pack - hence the 'rugged' requirement.

 

Needs to be under 20,000 mAh so I can carry as cabin baggage

 

I need this in the next few days, so it needs to be in stock in NZ

 

The best candidate I have found so far is the Griffin 5.11 'tactical'

 

https://www.noelleeming.co.nz/shop/computers-tablets/accessories/portable-power-banks/griffin-gc43483-survivor-rugged-10050mah-powerbank-coyote-black/prod163953.html