Research & Development

Chip-type Ceramic
Secondary Battery
"EnerCera" Series

Compatible with High-temperature Installation
on Circuit Board or in Card


EnerCera is a Li-ion secondary battery with NGK's original Crystal Oriented Ceramic Plate as electrodes. The Crystal Oriented Ceramic Plate is composed of just an active material and it contains no organic binder or conductive material which exists in a Li-ion battery normally but does not contribute to battery capacity. Therefore, EnerCera realizes high energy density and low internal resistance with a small and thin body and is capable of high-temperature installation. The energy density is double and the internal resistance is less than a half ompared to commercial secondary batteries of the same size. Therefore, EnerCera is an ultra-small/ultra-thin onboard-type high-performance battery for operating ICs, sensors and a wireless communication system which needs large current such as several 10 mA to several 100 mA. In addition, CV (Constant Voltage)-charging capability eliminates the need for a charger IC to control the charge current.

An introductory video on "EnerCera" series (4:14)

"EnerCera Pouch" & "EnerCera Coin" Win CES 2019 Innovation Awards in Smart Energy.


EnerCera has two types: "EnerCera Coin," a coin type cell, 1 mm to 2 mm thick, for mounting on a circuit board, and "EnerCera Pouch," an ultra-thin and bendable cell, 0.4 mm to 0.45 mm thick, for embedding in a card. EnerCera Coin is the world's first SMD (surface mount devices)-type Li-ion battery which can be mounted by Solder Reflow, commonly used as an electronic component-mounting process, and it has a high discharge current property sufficient to operate devices. EnerCera Pouch is the world's first thin-type Li-ion battery which can be embedded by hot lamination (above 100 degree Celsius) used widely in the IC card production. The EnerCera Pouch lineup has a fast charging type, a high-capacity type and a high-power type for customers' various device designs.

EnerCera Coin Lineup

Model Number ET1210C-R ET2010C-R ET920C
(under development)
(under development)
Dimensions: Diameter 12mm 20mm 9mm 16mm
Height 1mm 1mm 2mm 1.6mm
Nominal Capacity 5mAh 15mAh 8mAh 24mAh
Nominal Voltage 2.3V
Constant Voltage (CV) Charging OK (No current control required)
Internal Resistance 20Ω 30Ω
Peak Discharge Surrent*1 25mA 60mA 15mA 60mA
Oparation Temp. (recommended) -20℃~60℃
Heatproof Temp. (inprocess) 260℃ (reflowrable) 80℃

*1 Maximum current within 0.5V drop for 1 sec.

EnerCera Pouch Lineup

Model Number ET271704P-H EC382704P-H EC382704P-C EC382504P-P
Dimensions 27mm×17mm 38mm×27mm 38mm×27mm 38mm ×25mm
Thickness 0.40mm 0.45mm 0.45mm 0.45mm
Nominal Capacity 5mAh 20mAh 27mAh 20mAh
Nominal Voltage 2.3V 3.8V
Constant Voltage (CV) Charging OK (No current control required) N/A (CC-CV charging is required)
Internal Resistance 3.5Ω 2.5Ω
Peak Discharge Surrent*2 150mA 200mA 250mA 500mA
Bendability conforming to ISO 14443-1 standard
No deterioration after bending and torsion tests
Oparation Temp. (recommended) -20℃~60℃ 0℃~45℃
Heatproof Temp. (inprocess) 135℃ (hot lamination is available) 80℃ (cold lamination is available)
Features Fast charging*3 (High heat resistance) High heat resistance High capacity High power

*2 Maximum current within 0.5V drop for 1 sec
*3 80% capacity is charged for 10 min.