The voltage of 18650 battery and mobile phone battery is basically the same, so you can use 18650 battery to charge the mobile phone battery.
Voltage of 18650 battery: Common 18650 batteries are divided into lithium ion batteries and lithium iron phosphate batteries. The voltage of lithium ion battery is 3.6V and 4.2V, the voltage of lithium iron phosphate battery is 3.2V, the capacity is generally 1200mAh to 3000mAh, the Common capacity is 2200 mAh to 3600 mAh.
Mobile phone voltage:
The standard discharge voltage is 3.7V, the charging cut-off voltage is 4.2V, and the discharge cut-off voltage is 4.2V is 2.75 V. The unit of power is Wh (watt hour). Since the standard discharge voltage of cell phone batteries is uniformly 3.7 V, mAh (milliamp hour) can also be used instead. The conversion relation inter these two types of units on cell phone batteries is: Watt-hour = Ampere-hour × 3.7.
Detailed information
Precautions for charging mobile phones
1. The charging time should not be too long, which will seriously affect the battery. life and increase the risk of danger.
2. Try to use the original charger for charging. The universal charging current is unstable and the quality varies, which can easily cause danger.
3. Frequent surface charging can help extend the life of mobile phones. Lithium batteries require small and frequent meals. For them, this charging method is the most suitable and best use of the battery.
4. If you do not unplug the power once it is fully charged, the battery will remain fully charged. Even though it won't explode, this will also accelerate the loss of battery capacity.
How long does it take for a 18650 lithium battery to be fully charged?
Conventional capacity 18650 lithium battery type 1800-2400 (material ternary), the charging current is generally 0.5C, which is 1A\r\nAs for the 1200-1500 magnification type, the charging current is also 0.5C, but only 0.7A\r\nThe batteries with lithium generally use a small charge and discharge current if the current is increased, the charge and integration speed of lithium will be too fast, the impact on the material structure of positive and negative electrodes will be devastating, the life of life will end quickly within a dozen weeks and may also cause safety issues.\r\nThe above refers. to bare cells, while usually finished battery pack is added during use, so don't worryas!
A single 18650 battery can typically be fully charged in 1.5 hours. Because the capacity of a single 18650 battery is about 2200-3300 and the charging current can reach 1A. Therefore, it can be fully charged in 1.5 hours.
Advantages of 18650 lithium battery:
1.
(1) Portable computers, walkie-talkies, portable DVDs, instruments, audio equipment, model airplanes, toys, video cameras, digital cameras and other electronic equipment.
2. Serial connection.
(1) It can be combined in series or parallel to form an 18650 lithium battery.
3. Small internal resistance.
(1) The internal resistance of polymer batteries is lower than that of ordinary liquid batteries.
(2) The internal resistance of domestic polymer batteries can even be less than 35 mΩ, which significantly reduces the self-consumption of the bbattery and prolongs the standby time of the mobile phone, which can fully reach the level of international standards. .
4. There is no memory effect.
(1) There is no need to drain the remaining energy before charging, which is convenient to use.