TC (Button Type Titanium Carbon Lithium Rechargeable Battery)

TC (Button Type Titanium Carbon Lithium Rechargeable Battery)


The inquiry about this product


Product Information


The button type titanium carbon lithium rechargeable battery is a small rechargeable battery developed as a backup power source for real-time clocks and SRAM like digital cameras and mobile phones. It provides fully 10 times the capacity of a capacitor of the same size.


•Approx. 1.5V operating voltage
The operating voltage is about 1 to 1.5V the same as the SR, LR battery.

•Wide range charging voltage (Fig. 1)
Charging voltage is 1.6 to 3.15V.

•Excellent cycle performance (Fig. 2)
500 charge/discharge cycles is archived.

•Wide temperature characteristics (Fig. 3)
Usable in a wide temperature range of -20 to 60 deg. C.

•Excellent overcharge characteristics
A special formulated organic electrolyte is employed to provide stable discharge characteristics even if charged for 10 years at 3.15V at 20 deg. C.(under accelerated test conditions conducted by Maxell)

•Superior leakage resistance
Leakage resistance can withstand over 1,200 heat shock cycles between 60 deg. C. and -10 deg. C.

Product list

Maxell TC (Titanium Carbon lithium rechargeable) batteries are available only for equipment manufacturers as a built-in part. Therefore, Maxell does not supply these batteries for replacement directly to users of equipment with these batteries. When built-in TC batteries need to be replaced, please contact your equipment manufacturer. If you are planning to use Maxell TC batteries in your equipment as a built-in part, please contact Maxell.

Model Nominal Voltage (V) Nominal Capacity (mAh)* Nominal Discharge Current (µA) Charge/
(deg. C)
Dimensions Weight (g) Battery Properties Warn
Diameter (mm) Height (mm)
TC 920S 1.5 3.5 100 500 -20 to +60 9.5 2.05 0.43 pdf

* Nominal capacity indicates duration until the voltage drops down to 1.0V when discharged at a nominal discharge current at 20 deg. C.


Principle and Reactions

The button type titanium carbon lithium rechargeable battery uses lithium titanium oxide as the positive material, carbon for negative material and specially formulated organic electrolyte solution.

Fig. 1 Charge Property

Fig. 2 Charge/Discharge Cycle Performance

Fig. 3 Temperature Characteristics


●Mobile Phones
●Digital Still Cameras
●Portable CD/MD Players


• Data and dimensions are not guaranteed. For further details, please contact us at your nearest Maxell office.
• Contents on this website are subject to change without notice.

Q1: Primary battery


Source of electrical energy obtained by the direct conversion of chemical energy and not designed to be charged by any other electrical source.

Q2: Rechargeable battery (Secondary battery)


Source of electrical energy obtained by the direct conversion of chemical energy designed to be charged by any other electrical source. It is also called a storage battery or accumulator.

Q3: Open circuit voltage (OCV)


Voltage across the terminals of a battery when no external current is flowing.

Q4: Closed circuit voltage (CCV)


Voltage across the terminals of a battery when it is on discharge.
As a battery has an internal resistance, CCV is lower than OCV and CCV becomes lower with a range of current.

Q5: Nominal voltage


Suitable approximate value of voltage used to identify the voltage of a battery.
For example) Alkaline manganese battery; 1.5V
Lithium manganese dioxide battery; 3.0V

Q6: Load


External device or method through which a battery is discharged.

Q7: End-point voltage (End voltage, Cutoff voltage, Final voltage)


Specified closed circuit voltage at which a service output test is terminated.

Q8: Internal resistance


Resistant component in a battery that makes discharge reaction slow.

Q9: Discharge


Operation during which a battery delivers current to an external circuit.

Q10: Over discharge


Continue to discharge after a battery voltage drops below its end-point voltage.

Q11: Self discharge


Decreasing capacity during storage without load, caused by chemical reaction in a battery. The higher the temperature during storage, the greater the rate of self discharge.

Q12: Discharge characteristics (Discharge curve)


Change of a battery voltage with discharge.

Q13: Charge


Operation during which a reverse reaction of discharge occurs when electrical energy is received from an external source.

Q14: Polarization


Voltage deviation from equilibrium caused by charge or discharge.

Q15: Duration time (Duration period)


Time until a battery voltage exceeds the end-point voltage during discharge.

Q16: Capacity


Capacity (Ah, mAh) is the product of the discharge current (A, mA) and discharge time (h).
Note: Because manganese dry batteries and alkaline manganese batteries are often used for heavy-duty applications, the discharge time at a specific load is usually mentioned instead of the capacity.

Q17: Energy Density


Usable energy of a battery per unit volume or unit weight. The former is called volumetric energy density (Wh/l); the latter gravimetric energy density (Wh/kg).

Q18: Initial test


Test conducted within 2 months of the production month.

Q19: Storage


Store the battery under specified conditions.

Q20: Test after storage


Test conducted within 2 weeks after storage.

Q21: Aging


A finished or semi-finished battery is store under specified conditions for a specified period.

Q22: Expiry date


Expiration of guarantee period of a primary battery determined by each manufacturer conforming to the IEC. Because a secondary battery can be used over again by charging, it is unnecessary to show this.

Note: IEC (International Electrotechnical Commission) is a worldwide organization of standardization comprised of all national electrotechnical committees.

Q23: Active material


Electrode materials in a battery which cause an electrochemical reaction to generate electricity.

Ex) Battery Positive material Negative material
LR Manganese Dioxide Zinc
CR Manganese Dioxide Lithium

Q24: Electrolyte


Medium in a battery which causes ions to move to create an electrochemical reaction. Either water or non-aqueous solution is used as solvent. The latter is called non-aqueous electrolyte solution, either organic or inorganic.

Q25: Utilization factor


Ratio of usable capacity against theoretical capacity.

Q26: Leakage resistance


Enduring characteristics against leakage.

Q27: Short circuit current


Surges of current across the terminals of a battery when it is short-circuited.

Q28: Internal short circuit


Direct contact electrically between the positive electrode and negative electrode caused by damage to the separator or gasket, or the presence of a conductor piercing the separators. A battery will become completely exhausted before use.

The inquiry about this product


Applied Core Technologies

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