Five 3.6V 18650 lithium batteriescan be equipped with a charger when combined into an 18V battery. A single battery is 3.6V When fully charged, the measurement is 4.2 V. When the node is fully charged and connected, the measurement is approximately 21 V.
If you want to fully charge , you need a charger with an output voltage of 22V. As for the output current of the charger, it depends on the capacity of a single battery. The 5 battery combination is fully charged at about 21V, but it doesn't take long after being connected to charge, because the laptop uses an external 19V power supply, and the battery reaches 18V after being used for a while and cannot be used. .
Advantages of lithium batteries:
1. The energy ratio is relatively high. It has a storage energy densityhigh, currently reaching 460 to 600 Wh/kg, approximately 6 to 7 times that of lead-acid batteries.
2. Long service life, service life can reach more than 6 years. The battery with lithium iron phosphate as the positive electrode can be charged and discharged with 1CDOD, and there is a record that it can be charged and discharged. used 10,000 times.
3. The rated voltage is high (the operating voltage of a single unit is 3.7V or 3.2V), which is approximately equal to the series voltage of three nickel-cadmium or nickel-cadmium rechargeable batteries. metal hydride. , which makes it easier to form a battery power supply.