Battery for Panasonic

PANASONIC Laptop Batteries – Reliable Replacements for Toughbook (CF/FZ), Let’s Note (CF-SZ/LX/MX/RZ) & More

Find the right replacement battery for your Panasonic laptop — fully compatible with rugged Toughbook series
(CF-19, CF-31, CF-33, CF-53/CF-54, CF-20, plus FZ tablets/laptops) and Japan-market
Let’s Note families (CF-SZ, CF-LX, CF-MX, CF-RZ). Every pack uses high-grade cells with smart protection for safe charging,
stable performance and long service life. Enjoy free delivery, a 1-year warranty, and expert compatibility support with every purchase.

How to identify the correct battery for your Panasonic

Check the full model on the bottom label: examples include CF-19, CF-31, CF-33, CF-53/CF-54, CF-20, CF-SZ5/SZ6, CF-LX3/LX4, CF-MX4, CF-RZ4, or FZ models.
Find the battery part number (P/N): Panasonic packs commonly use the CF-VZSUxx (Toughbook/Let’s Note) or FZ-VZSUxx (FZ series) format — e.g.
CF-VZSU53, CF-VZSU46, CF-VZSU29, CF-VZSU33, FZ-VZSU84. Matching the exact P/N is the most reliable way to ensure fit.
Single vs twin batteries: some rugged models (e.g. CF-20, CF-33) support two hot-swappable batteries (tablet + keyboard/base). Check which positions your unit uses.
Match voltage & capacity: verify the voltage (e.g. 7.2/7.6/7.7 V, 10.8/11.1 V, or 14.4/14.8/15.2 V) and the capacity (Wh) printed on your original battery.
Model generation (Mk1/Mk2/Mk3): Toughbook “Mk” revisions may use different P/Ns. If in doubt, note both the model and Mk version.

How to search on our website

Search by battery P/N for an instant match (e.g. CF-VZSU53, CF-VZSU46, FZ-VZSU84).
No P/N? Enter your full laptop model (e.g. “CF-31 Mk3”, “CF-53”, “CF-SZ6”, “CF-20”). Including the Mk/year helps narrow results.
Use filters (series/chassis, capacity, voltage/cell count) to refine quickly.
Open a product page to confirm compatible models and technical specifications before purchase.

Still unsure? Leave your model (with Mk) and/or battery P/N in the checkout notes and our
Compatibility Assurance team will double-check your order before we ship — so you get the right fit first time.

Popular Panasonic families (examples)

Toughbook CF-19 / CF-31 — fully-rugged convertibles/notebooks; check Mk and battery bay count.
Toughbook CF-53 / CF-54 — semi-rugged; verify 10.8/11.1 V vs 14.4/14.8 V options.
Toughbook CF-33 / CF-20 — detachable 2-in-1; tablet and base may each house a battery.
Let’s Note CF-SZ / CF-LX / CF-MX / CF-RZ — ultra-light Japanese-market lines; model-specific pack outline.
FZ Series (select models) — verify by exact FZ-VZSUxx P/N and voltage.

Battery care tips

Avoid frequent deep cycles; partial charges (20–80%) reduce wear.
Keep the device cool; heat is the main factor that accelerates battery ageing.
For long storage, power down around 40–60% charge and store in a dry, moderate-temperature place.
For models with two batteries, rotate usage periodically to balance ageing.

FAQs

Can I upgrade to a higher-capacity pack?

Where multiple Wh options exist, you may choose a higher capacity if voltage, connector and outline match. Expect a modest increase in weight/charge time.

Do I need two batteries for CF-20/CF-33?

Not required. Many units run with a single battery; the second is optional for extended runtime or hot-swap. Check your device configuration.

Is calibration necessary after installation?

We recommend one calibration cycle: charge to 100%, rest 1–2 hours on AC, discharge to ~10–15%, then charge to 100% again. Repeat every few months if readings drift.

Showing 1–12 of 18 results