Small button batteries are used in miniature electrical appliances such as calculators or remotes. Each gadget requires its own special battery, which will slightly differ from any other in voltage and size. Therefore, it is very important to choose the right power source so as not to harm the gadget.
Content
390 Battery Specifications
Each tablet-type battery has a marking on which you can understand what its characteristics are. For battery 390, it will be:
| Parameter | Value |
|---|---|
| Basic designation | 390 |
| View | Silver zinc |
| The form | Tablet (Coin) |
| Capacity | 100 mAh |
| Voltage | 1.55 V |
| Analog 390 | Read more HERE |
| Diameter | 11.6 mm |
| Height | 3.1 mm |
| Working temperature | from -10 to + 50˚C |
| Weight | 4 gr |
The main parameters of such a battery are unchanged, but the capacity may vary significantly from different manufacturers.
Battery Applications
The scope of the 390 battery is limited only by the power consumption of the electrical appliance. Unfortunately, this element is not able to power devices whose power is high enough, but can be successfully used in the following miniature products:
- Hours.
- Flashlights.
- Calculators.
- Children's toys.
- Medical equipment.
- Some hearing aids.
Instruments that use the 390 battery must be without additional options that consume electric current, for example, a clock without backlight and an alarm clock.
Battery Analogs 390
There are enough analogs with which you can replace the original element to easily pick up the product if the 390 battery is not on sale. If you failed to purchase the original product, you can safely install one of the following elements in the electronic device:
- 389.
- SR54.
- RW39.
- SB-AU.
- SR1130W
- SR1130SW.
Analogs can significantly differ from the original only in capacity, with regard to voltage and shape, then they completely coincide.
Can I charge the 390 battery
If the battery is completely discharged, then it will not be possible to restore the charge. In this situation, it remains only to purchase and install a new element 390 or search for an analogue.
You should not even try to charge the battery using the AC adapter. In this case, you can overheat the product and cause a fire or explosive depressurization.
Popular manufacturers and their features
Regardless of the company that produced the 390 battery, this element will be able to fully provide the device with a sufficient amount of electric current. From this brand and brand can only depend on the duration of the electronic device.
Given the fact that many miniature products have to be disassembled to replace the battery, it is better not to save on quality. The following manufacturers have proven themselves best:
The products of these companies are of high quality and reliability. In addition to original products of good quality, the following companies produce analogues:
- Sony
- Varta.
- Maxell.
- Renata.
- Toshiba
- Duracell.
- Panasonic
A good quality analogue (SB-AU) is produced by the Japanese company Seico, specializing in the production of clockworks and batteries for them.
What to look for when purchasing
When buying a new product, you should pay attention to the marking. The designation of the type of battery is applied to the packaging, as well as to the positive terminal of the battery. The product’s name also indicates the manufacturer’s case.
If you purchase an original product or its analogue, then there is no doubt that the voltage of the product meets the necessary parameters, of course, provided that the battery has not expired.
