Maxell Lithium button cell CR2025 - Powerful energy source for your devices

The Maxell CR2025 is a powerful and globally proven 3-volt lithium button cell designed for the long-lasting and safe operation of your everyday small devices. As one of the pioneers in battery manufacturing, Japanese manufacturer Maxell guarantees the highest reliability and a leak-proof design.

With a thickness of 2.5 millimetres, this cell offers the perfect compromise between a slim design and high capacity (approx. 170 mAh). It supplies car keys, medical devices and smart home sensors with a stable voltage for years. The advanced lithium manganese dioxide chemistry also ensures extremely low self-discharge, making the CR2025 perfect for long-term storage.

Highlights at a glance

• Long-lasting power: With around 170 mAh capacity, this 3-volt cell provides enduring energy for more power-hungry small devices.
• Excellent shelf life: Thanks to extremely low self-discharge, the battery remains ready for use even after up to 10 years of storage.
• Leak-proof design: Maxell guarantees the highest manufacturing standards, effectively protecting your valuable electronics from corrosion.
• Temperature resistant: Functions absolutely reliably in freezing cold (-20 °C) up to strong heat (+85 °C).
• Environmentally friendly: The advanced lithium technology is completely free from added toxic mercury (0% Hg).

Areas of application

The CR2025 is the long-lasting classic for compact battery compartments:

• Car keys & remote controls: The absolute standard for many modern remote keys (e.g. VW, Audi, BMW) and garage door openers.
• Sports & health: Perfect for chest straps, pedometers, blood glucose meters and digital clinical thermometers.
• Smart home & IT: Reliable power source for mainboards (CMOS battery), smart thermostats and small alarm sensors.
• Consumer electronics: Ideal for 3D glasses, small remote controls (e.g. for LED candles or car radios) and calculators.

Assembly & safety instructions

• Keep away from children: Button cells can cause life-threatening internal injuries and burns if swallowed. Always keep batteries absolutely out of the reach of small children!
• Correct polarity: The flat side with the stamped inscription is always the positive pole (+), the slightly rougher/curved underside is the negative pole (-).
• Avoid fingerprints: Ideally, only touch the edge of the button cell when inserting it. A layer of grease from the fingers on the large contact surfaces can impede the flow of current and cause failures.
• Not rechargeable: This is a primary cell. Never try to charge the battery in a charger. This can cause overheating or explosion.

Features

FAQs about the Maxell CR2025

Does the CR2025 also fit where a CR2032 was used before?

Often yes, but it is not ideal. The CR2025 is thinner at 2.5 mm than the CR2032 (3.2 mm) but has exactly the same diameter. If the spring contact in the battery compartment is flexible enough, the device will function. However, the CR2025 has significantly less capacity (approx. 170 mAh vs. 220 mAh), so it will run out noticeably faster. Conversely, a CR2032 often does not fit in a compartment intended for CR2025, as it is too thick and the cover will not close.

What do the numbers "2025" stand for?

The designation is an internationally standardised code: the first two digits ("20") represent the diameter of the button cell in millimetres (20.0 mm). The last two digits ("25") indicate the height in tenths of a millimetre, in this case 2.5 mm.

What is the best way to store my spare batteries?

Ideally, store lithium button cells in their original packaging (blister) in a dry, cool place at normal room temperature. Avoid direct sunlight or proximity to heaters. The refrigerator is not necessary and is rather unsuitable due to possible condensation when removing.