Kastar AAAA 1.2V 400mAh Battery 1 Pcs and USB Charger Replacement for Surface Pen Battery, Asus Stylus, Sonic Tooth Scaler, Video Game Controllers, Bluetooth Headset, Glucose and Blood Monitor Battery - Walmart.com
Amazon.com: Energizer AAAA Batteries, 1.5 Volt Battery AAAA Alkaline, 2 Count : Health & Household
Streamlight AAAA Batteries (6-Pack) 65030 B&H Photo Video
Duracell Specialty Alkaline AAAA Battery 1,5V, Pack of 2 (LR8D425) Suitable for use in Digital pens, Medical Devices and headlamps : Amazon.in: Electronics