Batteries and their accessories for the Nucleus Sprint
De Sprint is the bodyworn processor with a BTE microphone and a coil.
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Battery case for 2 AA batteries (Nucleus Sprint)
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"Double battery case"
This battery case houses 2 AA batteries (rechargeable or not) for the Sprint.

Battery case for 1 AA battery (Nucleus Sprint)
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"Single battery case"
This battery case holds 1 AA battery for the Sprint.

4 rechargeable batteries (Nucleus Sprint, Auria kind, Digi SP'k)
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"4x Battery, NiMH-Akku, 1.2V - 2400 mAh, ANSMANN"
4 rechargeable AA batteries for the Sprint battery packs and for the batterypack of the Esprit 3G and the Freedom pediatric CI.