AA batteries are available in multiple chemistries, each with different performance and voltage characteristics.
| Type | Nominal Voltage | Rechargeable | Typical Use |
|---|---|---|---|
| Alkaline AA | 1.5V | ❌ No | Everyday devices |
| NiMH AA (Nickel-Metal Hydride) | 1.2V | ✔ Yes | Rechargeable household use |
| Lithium AA (Primary) | 1.5V | ❌ No | Long-life / extreme temps |
| Li-ion “14500” (AA-size)* | 3.6–3.7V | ✔ Yes | Specialty electronics only |