Energizer Specialty Alkaline N Calculator Batteries (2-Pack) in the Device Replacement Batteries department at Lowes.com
Energizer E90 N Alkaline 1.5 Volt Battery (6-Pack) - Walmart.com
Amazon.com: Tectra 1.2V 700mAh LR1 N Size Ni-Mh Rechargeable Battery with USB Charger, Long Lasting, All-Purpose N Battery, 2 Count : Health & Household
D-Cell USB Rechargeable Batteries | Pale Blue – Paleblue
Amazon.com: Tectra 1.2V 700mAh LR1 N Size Ni-Mh Rechargeable Battery with USB Charger, Long Lasting, All-Purpose N Battery, 2 Count : Health & Household