Energizer® E90 batteries.
Used in Bluetooth® headsets, glucose and blood pressure monitors and more.
| Cell size | Type | Voltage | Replacement for |
| E90/N | Miniature Alkaline | 1.5 | 4001, 810, 910A, AM5, LR1, MN9100, UM-5 |
Coin lithium button batteries can cause severe injuries when swallowed. Please store safely away from children.