Thin-type Lithium Primary Batteries for overall thickness and weight reduction in devices.

Thin-type(CF) Lithium Primary Batteries

Thin and light like paper, these batteries are
ideal for IoT devices.

FDK's thin primary batteries are thin and light like paper, with a thickness starting from 0.45mm and a weight starting from 0.4g. They are suitable for IoT, medical, wearable, card-type, patch-type, and melody card devices. In addition, they have a low self-discharge rate of less than 3% per year (at room temperature) and can be expected to last for 5 years. They are ideal for fintech applications such as dCVV cards and OTP cards. And FDK's thin primary batteries use an aluminum laminate film instead of the outer casing of a lithium coin battery. They have good current characteristics because the facing area between the positive and negative electrodes is large. In tests simulating the transmission pattern of Bluetooth® Low Energy, they have flowed more than 3 million discharges. Moreover, they have passed the ISO/IEC10373-1 bending test. Rest assured even if you keep the battery-equipped card inside your wallet because it is flexible to use on curved surfaces.

Features

  • Ultra-thin type : 0.45mm (CF042223, CF042722U, CF042039)
  • Low self-discharge rate and long life.
    Self-discharge rate : less than 3% per year at room temperature.
  • Usable over wide temperature range.
    Operational temperature range : -10°C to +60°C (+14°F to +140°F)
  • Ideal for Bluetooth communication
  • ISO/IEC10373-1 Supports bending tests
  • UL recognition (File No. MH13421) UL recognition (File No. MH13421)
lithium batteries that contribute to thinner, lighter, smaller, and slimmer devices The battery is in a thin form, like a film or sheet! ISO/IEC10373-1 Supports bending tests
graph

Applications

  • Credit cards with dynamic code display
  • Card type security systems
  • Electronic tags
  • Gift cards
  • Medical patch
  • Toys
  • Sensors
  • Trackers
  • Wearable devices
credit cards with dynamic code display

Specifications

Model CF042223
C042223
 CF042722U
C042722U
 CF042039
CF042039
 CF052722U
CF052722U
 CF052039
CF052039
Nominal Voltage 3V 3V 3V 3V 3V
Nominal Capacity※1 12mAh 15mAh 25mAh 22mAh 35mAh
Standard Discharge Current 0.25mA 0.25mA 0.25mA 0.25mA 0.25mA
Dimensions Length L:27.0mm
(ℓ:24.0mm)		 L:25.5mm
(ℓ:22.5mm)		 L:42.5mm
(ℓ:39.5mm)		 L:25.5mm
(ℓ:22.5mm)		 L:42.5mm
(ℓ:39.5mm)
Width 23.0mm 27.5mm 20.5mm 27.5mm 20.5mm
Thickness 0.45mm 0.45mm 0.45mm 0.55mm 0.55mm
Approx. Weight 0.4g 0.4g 0.5g 0.5g 0.6g
Data sheet Data sheet Data sheet Data sheet Data sheet Data sheet
  • ※ Expected life is 5 years at room temperature.
    Expected life is reference only and is not intended to imply any guarantee or warranty. Actual life depends on condition of use.
  • ※ Consult with FDK when considering connection method and multiple-cell configuration.
  • ※1 Nominal capacity is determined at an end voltage of 2.0V when the battery is allowed to discharge at a standard current level at +23°C.
dimension
Inquiry

FAQ

Q : What applications is it suitable for?
A : It is suitable for thin IoT devices and wearable applications that can take advantage of its shape since a thin and lightweight battery.
Q : What is the shipping record so far?
A : Shipping began in 2011, and as of FY2023, a total of 32 million units have been shipped.
Q : What country of origin is it?
A : It is manufactured in Japan.
Q : How should the battery and circuit board be connected?
A : We recommend ACF(Anisotropic Conductive Film) connection.
Q : Is thermal press fitting possible?
A : Yes. It is possible.
Q : Can some cells use at the same time?
A : Yes. Please contact us if you use assembled them.
Q : Is it suitable for curved surface applications?
A : Yes. It is compatible with curved surface applications and has twice the performance of the card bending test standard ISO/IEC 10373-1.
Q : How many years can it be used?
A : The expected life is 5 years.
Q : How much current can a thin-type lithium battery discharge?
A : This battery can discharge 10 mA for 1 second. Under these discharge conditions, it can maintain a voltage of 2V or higher at -10°C.
Q : How can I dispose of used batteries?
A : Please dispose of it according to the disposal method of each country and local government.
  • The contents of this catalogue are not guaranteed.