Each Battery 7.9mm x 3.6mm.

Number Of Batteries: 8 Batteries
Features: Replaceable Battery
Manufacturer Warranty: See Packaging
MPN: 312
Sub-Type: Hearing Aid Batteries
Unit Type: Unit
Labels & Certifications: CE Certificate
Number of Settings: 1
Power Source: Battery
Country/Region of Manufacture: United Kingdom
To Fit: Both Ears
Colour: Brown
Model: 312
Expiry Date: Long Date
Sound Processing: Digital
Unit Quantity: 8/80
Brand: Rayovac
Type: Hearing Aid Battery
Items Included: Hearing Aid Battery