What battery do I need to for my 4iiii powermeter? August 23, 2024 20:04 Updated 4iiii Powermeters require a standard CR2032 Lithium-ion coin cell battery. Related articles Changing Your PRECISION Battery I am having trouble connecting/pairing my powermeter (ANT+ or Bluetooth) Powermeter Zero-Offset (Calibration) Explained My powermeter is reading incorrectly/inaccurately Why Can't I Pair My Powermeter to My Bluetooth Head Unit or App?