Panasonic CF-VZSU1QJS Battery for Panasonic Let's note SV / FV
- Part Type:
- Battery
- Laptop Family:
- Panasonic Let's note SV / FV
Quick facts
CF-VZSU1QJS is a battery that fits 3 laptop models: Panasonic Let's note CF-FV1, Panasonic Let's note CF-FV3, Panasonic Let's note CF-FV4. It is also sold as CF-VZSU1SJS.
| Part number | CF-VZSU1QJS |
|---|---|
| Part type | Battery |
| Also sold as | CF-VZSU1SJS |
| Fitment confidence | OEM confirmed |
| Last checked | 2026-10-06 |
Compatible models (3)
- Panasonic Let's note CF-FV1
- Panasonic Let's note CF-FV3
- Panasonic Let's note CF-FV4
Laptops compatible with CF-VZSU1QJS
Fits 3 laptops: 3 OEM confirmed, 0 seller listed, 0 reported by users.
Also sold as: CF-VZSU1SJS
- Panasonic Let's note CF-FV1OEM confirmedMatched on: part number CF-VZSU1QJS
- Panasonic Let's note CF-FV3OEM confirmedMatched on: part number CF-VZSU1QJS
- Panasonic Let's note CF-FV4OEM confirmedMatched on: part number CF-VZSU1QJS
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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: Panasonic Last updated: 2026-10-06
Where to buy
- Amazon JapanGo to store
- Panasonic Store PlusGo to store
Panasonic CF-VZSU1QJS Battery for Panasonic Let's note SV / FV Review
Panasonic CF-VZSU1QJS battery pack (L) for the Let's note CF-FV1, FV3 and FV4.
CF-VZSU1QJS is Panasonic's optional large L pack for the Let's note FV line: 3 cell, 11.55V, 4786mAh, about 55.3Wh by our calculation. It fits the CF-FV1, FV3 and FV4 and nearly doubles the rated capacity of the standard S pack, at about 100g more weight. Black body owners should buy CF-VZSU1SJS. It does not fit the CF-SV line. We recommend it for anyone who works away from a socket all day.
Fitment answer
OEM confirmed for the Let's note CF-FV1, FV3 and FV4. CF-VZSU1QJS is Panasonic's optional L pack: 3 cell, 11.55V, 4786mAh.
The 55.3Wh figure is our calculation from Panasonic's rating.
Which laptops this fits
Panasonic lists the pack for the CF-FV1, CF-FV3 and CF-FV4, and the FV basic guide names CF-VZSU1QJS as the L pack.
It does not fit the CF-SV line, which uses CF-VZSU1CJS and CF-VZSU1DJS.
What to check before you buy
Body colour decides the part number. CF-VZSU1QJS is for silver and black-and-silver bodies; CF-VZSU1SJS is the black body version.
It runs at the same 11.55V as the standard S pack CF-VZSU1PJS, so a laptop shipped with the S pack can take it. Expect about 0.30kg against 0.20kg.
Part numbers this replaces
CF-VZSU1SJS, the black body version. A laptop that came with the S pack (CF-VZSU1PJS or CF-VZSU1RJS) can also take this L pack, per Panasonic's option list.
Safety and handling
If the pack looks swollen, bulges the case or lifts the keyboard or touchpad, stop using the laptop and stop charging it. Do not puncture, bend or press on it.
New lithium packs ship at partial charge because transport rules cap how charged a battery can be in transit. A pack that arrives low is normal, not faulty.
Recycle the old pack at an electronics or battery drop-off point. Never mail a used or swollen battery back to a seller.
Age and condition
Panasonic sells this pack new through its own store. We found no published date code policy.
Ask any seller for the manufacture date before you pay. Old stock can arrive below its rated capacity.
If this is not yours
Read the part number printed on the battery you are replacing and the model code on your laptop's label. If neither appears on this page, this is not your part.
Own a CF-SV? Look at CF-VZSU1CJS or CF-VZSU1DJS. Want the lighter FV pack? Look at CF-VZSU1PJS. For everything else, browse our full laptop parts catalog at /laptop-parts.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Let's note CF-FV1, FV3 and FV4 owners who want maximum runtime
- Silver and black-and-silver FV bodies
Not for
- Let's note CF-SV owners
- Black body FV owners (buy CF-VZSU1SJS)
Specifications
| Part Type | Battery |
|---|---|
| Brand | Panasonic |
| Part Number | CF-VZSU1QJS |
| Alternate Part Numbers | CF-VZSU1SJS |
| Compatible Models | Panasonic Let's note CF-FV1, Panasonic Let's note CF-FV3, Panasonic Let's note CF-FV4 |
| Fitment Confidence | OEM confirmed |
| Description | Battery pack (L), 3-cell Li-ion |
| Voltage | 11.55V |
| Rated Capacity | 4786mAh |
| Energy Wh Computed | about 55.3Wh |
| Cells | 3 |
| Mass | about 0.30kg |
| Market | Japan |
FAQs
Is this the biggest battery for the Let's note FV?
Yes, as far as Panasonic's option list goes. The FV line has two genuine packs, the S CF-VZSU1PJS and this L pack.
Why does my Let's note say the battery is not genuine?
We have not found Panasonic documentation on how Let's note firmware treats a non Panasonic pack. CF-VZSU1QJS is the genuine part, so buying it avoids the question.
Why did my new battery arrive at 30 percent?
Lithium packs have to ship partly charged under transport rules, so a low reading on arrival is expected. Fit it, charge it to full on the laptop's own adapter, and judge runtime only after a full cycle.