The following Song Meter recorders accept AA batteries:

• Song Meter Mini 2 (AA model)
• Song Meter Mini
• Song Meter Mini Bat 2 (AA model)
• Song Meter Mini Bat
• Song Meter Micro 2
• Song Meter Micro

AA batteries include the following battery compositions:

• alkaline
• rechargeable nickel-metal hydride (NiMH)
• lithium/iron disulfide (sold as Energizer Ultimate Lithium)

Alkaline

Alkaline batteries are the most common type of single-use AA batteries. When using AA batteries, the Song Meter Configurator app assumes you are using high-quality, alkaline batteries when estimating run time or providing a battery life percentage.

NiMH

NiMH batteries are the most common type of rechargeable AA batteries. NiMH batteries will last approximately half as long as alkaline batteries before they must be recharged. This runtime will gradually decrease as the batteries are drained and recharged repeatedly.

NiMH batteries output a slightly lower voltage than alkaline batteries, so the Song Meter Configurator app will report a lower-than-accurate battery percentage when using NiMH batteries.

Lithium/Iron Disulfide (Energizer Ultimate Lithium)

Lithium/Iron Disulfide batteries are patented by Energizer and sold under the name Energizer Ultimate Lithium.

This battery type is not to be confused with lithium-ion batteries. Lithium-ion batteries are rechargeable and output a significantly higher voltage than AA batteries, and they are generally not available in the AA size.

Energizer Ultimate Lithium batteries are not rechargeable. They output a voltage only slightly higher than alkaline batteries, so they can be used in devices that accept AA batteries. This slightly higher voltage means the Song Meter Configurator app will report a higher-than-accurate battery percentage when using Energizer Ultimate Lithium batteries.

These batteries are advertised as having higher capacity than alkaline batteries. The improvement over alkaline batteries is most significant in high-power devices or in cold temperatures. At room temperature, Energizer Ultimate Lithium batteries only provide Song Meters with 10-20% greater battery life than alkaline batteries. In cold temperatures, the difference increases because Energizer Ultimate Lithium batteries maintain their performance in the cold better than alkaline batteries.

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