Canon Mirrorless battery holder

This fits four LP-E12 Batteries
Which fit Canon cameras: Rebel SL1, EOS M, EOS M2, EOS M10, EOS M50, EOS M50 Mark II, EOS M100, EOS M200, PowerShot SX70 HS
Print two and you can use to sandwich together with a rubber band to protect your batteries in a bag.
This will even check for battery swell (Li-ion failure)