This CR2 power source is a cast-in-place battery. They are lightweight due to the use of new technology. These batteries were first manufactured in the 1990s. They are currently widely used in cameras, toys, medical equipment, and other devices.
CR2 battery characteristics
These batteries are shaped like a round cylinder with a distinctive label. The manufacturer provides technical information on it. The positive pole is a nub of processed manganese dioxide, while the negative pole is disc-shaped and made of lithium.
| Parameter name | Parameter data |
| Electrolyte | Manganese dioxide (Li/MnO2) |
| ANSI standard marking | 5046LC |
| IEC designation | CR15H270 |
| Length | 26.7 mm |
| Diameter | 15.1 mm |
| Weight | About 15 grams. |
| Operating temperature curves | From – 40 to + 75 degrees Celsius. |
| Voltage | 3 volts. |
| Capacity | About 850 mAh. |
| Self-discharge | 2% per annum. |
| Shelf life | Up to 10 years. |
| Maximum load current. | Up to 100 milliamps |
| Load current in pulse mode | up to 400 mA |
The CR2 marking indicates that the energy source is made of MNO2. The electrolyte is lithium perchlorate. It is present internally as an organic solution.
The main advantages of such batteries
- Big capacity.
- Stable work.
- Long service life.
- They operate in wide temperature curves.
- They are small in size.
- They have a small weight.
- Sold at a reasonable price.
Disadvantages include not setting them on fire, short-circuiting, disassembling, or exposing them to sunlight. These same practices are generally not acceptable with other batteries.
CR2 battery analogs
There are similar sized batteries of this type on the market:
- 15270 (5046LC) – diameter 15, length 27 mm, capacity 450-600 mA.
- – diameter 15, length 27 mm, capacity 750-800 mA.
- 15266 – voltage 3.6 volts, diameter 15, length 26.6 mm, capacity about 600 mA;
- CR2/38-L (Dimensions: Length 33.5 mm; Diameter 17 mm). Capacity 2000
- The CR17355 has a voltage of 3 volts. D = 17 mm. L = 35.5 mm. Capacity is approximately 750–900 mAh.
When replacing with analogs, you need to remember that cast energy sources have a high capacity unlike lithium-ion batteries. Therefore, the latter will lose charge faster and last shorter. capacityThe capacity will be approximately 500 mAh. In rare cases, it can reach 800. Lithium-ion batteries have a voltage of 3.6 volts, which may not be suitable for your device. Lithiumsame 3v.
Where is the battery used? CR2?
- Cameras.
- Flashlights.
- Flashes.
- Electric collars.
- Electronic locks.
- Metal detectors.
- Medical equipment.
- Laser pointers.
- Radio microphones.
- Receivers.
This power supply is also used in a number of other devices.
Is it possible to charge the battery? CR2?
If the cell is lithium, it cannot be charged. Only lithium-ion batteries of this size can be charged.
The reason the cell can't be charged is because lithium isn't stable under cyclic charging. Substances called dendrites form on its surface, causing short circuits. Furthermore, the temperature can rise significantly, causing the cell to melt or explode.
The most famous manufacturers
Most manufacturers equip their CR2 3V batteries with safety features such as valves that release excess gases. These gases are formed as a result of a chemical reaction. If not released, they can deform and explode.
Also, during production, complete sealing is carried out to prevent water and air from entering the energy source.
CR2 batteries have excellent technical parameters and high performance. Unfortunately, some types can be expensive. When used as intended, they can deliver excellent performance.
