Panasonic ViVi DX Battery: Pack Identity, Charging and Range Figures

Panasonic ViVi DX battery information for the current BE-FD434 and BE-FD634 identifies pack NKY594B02: 25.2 V, 16 Ah and 404 Wh. The product page separately names charger NKJ075Z. Keep those identities with the bicycle's code before asking about charging equipment or interpreting a range claim.

Identify the Panasonic ViVi DX battery by its code

The Japanese ViVi DX specification (https://cycle.panasonic.com/products/vivi_dx/) gives a battery mass of approximately 2.5 kg and a charging time of about five hours for the described equipment. These are product-record values, not a condition assessment of a used pack. Readable labels and the actual supplied instructions remain important in an ownership enquiry.

Capacity does not identify every electrical interface

A pack advertised simply as a Panasonic sixteen-amp-hour battery is not fully identified. Retain the complete battery code and bicycle model when requesting compatibility confirmation. Neither the shared manufacturer name nor a matching headline capacity proves that another pack, mounting arrangement or charger is approved.

Read the charger as a Japan-market item

The NKJ075Z entry specifies AC 100 V at 50 or 60 Hz. Do not rewrite that as a worldwide voltage rating or assume a travel plug makes it suitable for another electrical supply. Owners outside Japan should obtain the manufacturer's applicable equipment guidance rather than improvise a charger or power arrangement.

The record lists several batteries that the named charger can charge. That charger list is not a declaration that each listed pack fits every ViVi DX frame. Charging compatibility and bicycle compatibility are separate questions. This guide provides no battery-opening, repair or substitute-charger procedure.

Keep each distance with its assistance mode

The published mode figures are approximately 59 km in Power, 70 km in Automatic and 107 km in Long. They are manufacturer test figures, not results measured here. Their source qualifications include a new battery, a 65 kg rider-and-luggage load, specified tyre pressure and dry, smooth conditions.

The stated environment is 20 ± 5°C without wind, with the battery light off. A different route or older battery should not be expected to reproduce that setup. Use the Panasonic family background to keep the model identity clear, and the brand reference directory for related records. The 2015 pedelec photograph cannot verify the current battery code or its condition.

FAQ

Does the current battery entry say 404 Wh?

Yes. That is the rating printed beside NKY594B02.

Is the charger listed for any mains voltage?

No. The inspected entry specifies AC 100 V.

Is 107 km a promised distance for my bicycle?

No. It is a mode-specific manufacturer figure under stated test conditions.

Photograph credits and permissions

Photograph 1

Original title: Electric Bicycle Japan.jpg

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Source disclaimer: No endorsement by the photographer is implied. Exact current model and configuration unverified; historical brand context only.