Coin-type Rechargeable Lithium Batteries


  • Compatible with reflow soldering (Max. 260°C) (ML614R)
  • Stable operating voltage of 2.5V.
  • Capable of being charged at 2.8V.
  • Low self-discharge rate and long life
    Self-discharge rate : Approx. 2% per year at room temperature.
  • Usable over wide temperature range. Operational temperature range : -20°C to +60°C (-4°F to +140°F)
  • UL recognition (File No. MH13421)


  • Security Camera
  • Dashboard Camera
  • Electronic automobile keys (keyless entry)
  • Backup power source for RTC


  • Available with secondary tab processing in accordance with use.
  • ML614R is available with dedicated tab only.
  • Nickel-plated phosphor bronze or stainless steel should be used for battery contact terminal materials. To ensure stable contact conditions, contact pressure of several newtons is recommended when attaching.


Model ML614
Nominal Voltage 3V 3V 3V
Nominal Capacity※1 3.4mAh 5.8mAh 2.5mAh
Standard Discharge Current 0.015mA 0.015mA 0.005mA
Max. Pulse Current※2 1.5mA 1.5mA -
Charge/Discharge Cycle Characteristics 300
(Discharge depth of 20%)
(Discharge depth of 10%)
Charging Method Constant voltage charge 2.8 to 3.25V 2.8 to 3.1V
Dimensions Diameter 6.8mm 6.8mm 6.8mm
Height 1.4mm 2.1mm 1.4mm
Approx. Weight 0.16g 0.22g 0.19g
for Reflow Soldering - -
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.
  • ※2 Current value for obtaining 2.0V cell voltage when pulse is applied for 15 seconds at 50% discharge depth (50% of the nominal capacity) at +23°C.
  • The contents of this catalogue are not guaranteed.