3.7V lithium batteries are commonly sold in online stores.
Online shopping. It is sold on many online platforms. Including factory direct sales. Or the battery meter at your local electrical mall. 3If the quantity is large, you can order from the manufacturer. 18650 is the originator of lithium-ion batteries - a standard lithium-ion battery model defined by the Japanese company SONY in order to reduce costs. 18 means 18mm diameter, 65 means 65mm length and 0 means cylindrical battery.
Nitrides:
Alloys include tin-based alloys, silicon-based alloys, germanium-based alloys, aluminum-based, antimony-based alloys, and magnesium-based alloys and other alloys, there are no commercial products.
Nanocarbon tubes and materialsnanoalloys at the nanoscale.
Nano oxide According to the latest market development trends in the new energy industry of lithium batteries in 2009, many companies began to use nano titanium oxide and nano silicon oxide to add to the previous traditional graphite, tin oxide, and carbon nanotubes inside, it greatly improves the charge and discharge capacity as well as the number of charge and discharge times of lithium batteries.
The difference between 3 cell lithium ion batteries and 4 cell batteries
18650 3.7V battery can be used for 8 hours in a wireless microphone receiver. The voltage of 18650 lithium battery is 3.7V and it is 4.2V when fully charged. The main battery capacity is 1800 mAh to 2600 mAh. It is generally thought that when the voltage at vide of a lithium battery is less than 3.0 V, it is considered exhausted. However, when discharging most lithium batteries, the no-load voltage cannot be lowered below 3.2V, otherwise excessive discharge will damage the battery.
General configuration of an 18650 battery:
The nominal voltage of a single cell is generally: 3.6 V or 3.7 V< /p>
The charging voltage is generally: 4.20 V (lithium cobalt oxide is 4.2 V to 4.3 V)
The minimum end voltage Discharge voltage is typically: 2.75V. Lower than this voltage can easily cause significant battery drain. capacity or even scrapped
Maximum charging termination voltage: 4.20 V
Diameter: 18±0.2 mm
Height: 65± 2.0mm
Capacity: Above 1000mAh, conventional capacity is 2200mAh to 3200mAh, LG has the highest 18650 battery capacity, which can reach 3600 mAh, but the price is not low.
Reference for the above content: Baidu Encyclopedia-18650 lithium battery
The differences between the two batteries are as follows:
3 The price of 3-cell lithium batteries is relatively low and the volume is relatively small. The 3-cell lithium battery has a smaller capacity, so it is suitable for users who use it lightly.
4 cell lithium battery refers to There are 4 cells inside the battery, usually 3.7V cells, with a total voltage of 14.8V. For 3 cell lithium batteries, 4 cell lithium batteries have larger capacity and can provide longer usage time.