I wonder if this would work?
https://www.amazon.com/TalentCell-Rechargeable-12000mAh-Multi-led-indicator/dp/B00ME3ZH7C/ref=sr_1_3?crid=TNHZINZ47660&keywords=12v+battery+pack&qid=1571240093&sprefix=12v+batter%2Caps%2C169&sr=8-3
I had almost decided on the Winchester SXP waterfowl pump till I seen the CZ options. CZ has the dipped camo versions, 612 pump in 3 1/2" and the 712 semi only comes in a 3". Figured I'd ask about CZ before I made a purchase.