18650 lithium battery 3.7V6000ma how much charger

Use a charger with an output voltage of 5.0v and an output current of 1-2A. The larger the output current, the shorter the charging time. For example, the charging current of 2A can be fully charged in more than 3 hours. If it is 1A, you need 6 chargers. About half an hour. Large-capacity lithium batteries have low internal resistance, so a higher charging current is better.
How many watts of 6V photovoltaic panels are needed for a solar 25-watt light source 3.7v6000mah18650 lithium battery pack?

A regular 18650 lithium battery has a capacity of 1.2ah to 3.3ah (1ah is equal to 1000mah), the price of a 1.2ah battery is 1.5 yuan, and the price of a 3.3ah battery is more than 12. Most of these cheap products use the common specifications of 1.5ah to 2ah (the price is 3.5 yuan) ,

Let’s talk about the LED power. Generally, if one or more parallel groups are used for power supply, the LED power will not be too large. Ordinary 5730 lamp beads have a specification of 0.2w/0.5w, and the power can be calculated based on the number of beads.

The power divided by 3.7v (battery voltage) is equal to the current, and the battery capacity divided by the current is equal to the use time.

The charging time needs to be less than the daily light time (8.30 am to 17:00 pm), the charging current is equal to the battery capacity/(light time-2 hours), and the final calculated solar panel power is equal to the current multiplied by 6v