Camera Battery
From Amazon
Arlo Certified Accessory | Rechargeable Battery, Designed for Arlo Pro 3, Pro 4, Pro 5, Ultra 2, Security Cameras, White
EE Store
Arlo Rechargeable Battery - for Ultra and Pro 3
Comet
Arlo Rechargeable Battery Ultra, Pro 3, 4, 5 VMA5400-10000S
BatteryUpgrade
Arlo VMA5400-10000S battery (5200 mAh 3.85 V, White)