GP 30310 Batteries LR03 1.5 V SUPER Alkaline Micro AAA Battery (Pack of 4): Amazon.co.uk: Electronics & Photo
Lepro AAA Alkaline Batteries [Pack of 24], 1.5 Volt 1200mAh LR03 MN2400, Long Lasting Power, Holds Power Up to 10 years, Anti-Leakage Technology, Ideal for Everyday Devices
Panasonic Pro Power AAA LR03 Batteries | 4 Pack - BatteryStation.co.uk