9v Ni-MH Rechargeable Battery Square Battery 900mAh AAA Rechargeable Battery 280mAh AA Ni-MH Batteries Electric Remote Control Car Toy and Battery Charger | Wish
Square Rechargeable Batteries | 9 Volt Rechargeable Battery | Carbon Volt Battery - New - Aliexpress
U003 48v 50Ah BMS50A Large Aluminum Square Cell Large Capacity Lifepo4 Battery Pack With 5A Charger Fit For 0-1800W Ebike & Electric Wheel Bike Motor
Amazon.com: Eveready 6V Battery, Super Heavy Duty 6 Volt Battery, 1 Count : Sports & Outdoors
Nightstick Non-IS Removable 18650 Lithium-Ion Rechargeable Battery For USB-4708B (4700-BATT)
Amazon.com: Eveready 6V Battery, Super Heavy Duty 6 Volt Battery, 1 Count : Sports & Outdoors
A coworker of mine opened up a big square Duracell battery. Turns out it's just 4 smaller batteries on a cardboard platform. : r/mildlyinteresting