What Is a WUB Dual Cell Super Capacitor?
A dual cell super capacitor, also known as a 5.5V super capacitor, consists of two individual cells connected in series to achieve a higher operating voltage.
Click the link to learn more: WEET WUD 3.8V Radial Type Super Capacitors
What Is a WUD Single Cell Super Capacitor?
A single cell supercapacitor (also known as an ultracapacitor or double-layer capacitor) is a high-capacity energy storage device consisting of a single electrochemical cell.
Click the link to learn more: WEET WUB 5.5V 7.5V Combined Type Super Capacitors
Single Cell vs Dual Cell Super Capacitor
| Feature | WUD Single Cell | WUB Dual Cell |
| Rated Voltage | 2.5V~3.8V | 5.5V, 7.5V |
| Structure | One Cell | Two Cells in Series |
| Energy Storage | Lower | Higher |
| PCB Space | Smaller | Larger |
| Backup Time | Shorter | Longer |
Which One Should You Choose?
Choose a Single Cell Super Capacitor if:
Your system operates below 3.8V.
PCB space is very limited.
Choose a Dual Cell Super Capacitor if:
You need a 5.5V, 7.5V backup solution.
Your circuit operates at 5.5V, 7.5V.
Higher voltage is required.
Longer backup time is needed.
Common Applications:
Single Cell
Car electronics: Car audio, ETC system, driving recorder, etc.
Smart meter: Smart electricity meter, smart water meter, smart gas meter, etc.
Dual Cell Super Capacitors
Backup power: RAM, detonator, car recorder, smart meter, etc.
Energy storage: UPS, security equipment, communication equipment, flashlights, water meters, gas meters.
High current operation: Electrified railway, smart grid control, hybrid vehicle.
High-power support: Wind power, locomotive start, ignition, electric cars, etc.
Read the article to explore more applications of WUB Supercapacitors: WEET WUB 5.5V 7.5V Combined Type Super Capacitors for Power Backup Applicatinos
Why Choose WEET Dual Cell Super Capacitors?
Stable Performance
Long Cycle Life
High Reliability
OEM & ODM Support
Multiple Capacitance Options
Conclusion:
Looking for a reliable Dual Cell Super Capacitor supplier? WEET offers high-quality 5.5V super capacitors with stable performance and OEM customization for industrial applications.
WEE Technology Company Limited Published On Aug 7, 2026
WEE Technology Company Limited - WEE are Capacitors Specialist
As an energy storage element, button supercapacitor is widely used in the backup power supply of instruments and clocks.
It has the characteristics of short charging time, long service life, good temperature characteristics, energy conservation and green environmental protection.
C. H-type and V-type structures can be selected during installation;
Product application: backup power supply, data protection and backup functions in electronic products with memory storage function.
Suitable for systems with CPU. Intelligent "three meters", tax controller, solar lamp, toy, solenoid valve, LED display screen, solar spike lamp, solar lawn lamp, industrial controller, on-board navigation equipment, remote control electric toys, electric vehicles, hybrid vehicles, car audio, electric tools, wind power generation, industrial UPS, peak power compensation, DC screen and other fields。
https://www.weetcap.com/pdf/WEET-WUA-5.5V-Coin-Type-Cell-Super-Capacitors.pdf
WEE Technology Company Limited - WEE are Capacitors Specialist
WEET Engineers would like to share the advantages of super capacitor:
1. Capacitance up to Faraday level in a very small volume;
2. There is no need for special charging circuit and control discharge circuit;
3. Compared with battery, overcharge and over discharge have no negative effect on battery life;
4. From the perspective of environmental protection, it is a green energy;
5. The super capacitor can be welded, so there is no problem like the battery contact is not firm;
WEET Engineers also are aware of some disadvantages of super capacitor:
1. Electrolyte leakage will be caused by improper use;
2. Compared with aluminum electrolytic capacitor, it has larger internal resistance, so it can not be used in AC circuit;
For the selection of super capacitor, power requirement, discharge time and system voltage change play a decisive role. The output voltage drop of the super capacitor is composed of two parts, one is the energy released by the super capacitor, the other is caused by the internal resistance of the super capacitor. In the very fast pulse, the internal resistance part is the main part, on the contrary, in the long-time discharge, the capacitive part is the main part.
WEET provide Button super capacitor, hybrid super capacitor, super capacitor unit, super capacitor module. Below is some of WEET super capacitors category.
4.0F 5.5V special button super farad capacitor for backup power supply
2.0F 5.5V button super capacitor for farad capacitance instrument
1.0F 5.5V button super capacitor for standby power supply of instrument farad capacitor
2.7V series high temperature super capacitor 85 ℃
2.7V series energy type winding super capacitor monomer
3.0V series power type winding super capacitor has small volume, large capacity, long service life, small internal resistance and small leakage current
100F ~ 400F energy type horn terminal super capacitor
360F, 400F, 600F internal thread super capacitor
Large capacity super capacitor 3000F, 2000F, 1500F, 1200F, 1000F, 650F screw and lug terminals
Super capacitor 3000F, 2000F, 1500F, 1200F, 1000F, 650F laser welding screw terminal
WEET 2.7V Winding Ultracapacitor 2.5V Series Power Type Winding SuperCapacitor Radial and Screw Type
WEE Technology Company Limited - WEE are Capacitors Specialist
Super capacitor is a new type of energy storage device between the traditional capacitor and the secondary battery, which has both the high power characteristics of the traditional capacitor and the high energy characteristics of the battery.
Due to its characteristics of high specific power, high current charging and discharging capacity, long life, ultra-low temperature performance, high reliability and environmental protection, super capacitor has unique advantages as power or energy storage power in industrial electronics, transportation, renewable energy, military and other fields.
Product series: 2.7V (4000f / 3000f / 2000f / 1500f / 1200F / 650f / 350f / 120F);
2.7V series power type winding super capacitor
2.7V super farad capacitor (EDLC), small volume, large capacity, long service life, small internal resistance, small leakage current
The specification sheet of 2.7V winding ultracapacitor
Brand: WEET
Rated voltage VR: 2.7V
Surge voltage:2.85V
Capacity range:0.1F~3000F
Operating temperature range:-40℃ ~ +70℃
Product features: high power, small internal resistance, small volume, long service life, small leakage current
Application: smart meter, smart water meter, smart energy meter and other instruments, electronic toys, TV, LED flash, smart door lock, smart rice cooker, smart electric water heater, tax control machine, etc
WEE Technology Company Limited - WEE are Capacitors Specialist
WEET 3.0V power type super farad capacitor (radial leaded type) Product features:
ACP active carbon was used as electrode and organic electrolyte.
Rated voltage VR:3.0V
Surge voltage:3.15V
Capacity range:0.1F-700F
Operating temperature range:-40 ~ +65℃
3.0V Series: 0.1-120F, Radial Type
3.0V Series: 90-700F, Lug type
Cycle life: 500000 times
Single voltage: 3V and 3.5V
Environmental protection, small internal resistance, large capacity, small leakage current, long service life, high reliability, good product consistency. It can charge and discharge quickly and provide high power output for equipment.
Application fields: intelligent electricity meter, intelligent water meter, intelligent flow meter and other instruments, electric toys, cordless telephone, television, rice cooker, EVD, computer, Car Navigator, digital camera, LED flash lamp, solar power generation, ram, detonator, car recorder, intelligent instrument, vacuum switch, digital camera, motor drive, clock circuit, UPS, toys, program-controlled switch And so on.
WEET 3V Winding Type Super Gold Capacitors Series Product features:
-Product series: 3.0V (500F / 100F / 60F / 25F / 10F / 8F / 4.7F / 1.5F);
-Ultra low internal resistance, ultra high power
-Over 500000 duty cycles
-Integrated super capacitor management system (UMS)
-Monomer to monomer balance
-Over voltage and temperature monitoring signal output
-Negative and positive reverse signal output
-I / O or can output interface
-Firm, tight, closed
Normal temperature cycle life：25℃, 1 million cycles between VR and 1/2VR , Capacity attenuation≤30%, ESR change≤4 times.
High temperature endurance life：Maximum temperature retention VR，1000 hours.Capacity attenuation≤30%, ESR change≤4 times.