Battery 3,6 V for 3-in-1 unit

4004

Item numbers 4004 and 4004-1 are both for our 3-in-1 unit, but are compatible with different versions.

4004 is for our older model, whereas 4004-1 is compatible with our newer 2024 model.

You can check the version on the circuit board by unscrewing the four screws on the back.

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