I bought the 18650 battery in Yiwu, but it doesn't work when I put it in a flashlight. When charging, the green light of the charger is always on. After charging for seven or eight hours, the flashlig

I bought the 18650 battery in Yiwu, but it doesn't work when I put it in a flashlight. When charging, the green light of the charger is always on. After charging for seven or eight hours, the flashlight still doesn't work. It should be red when charged and green when fully charged. Yiwu's 18650 batteries are generally disassembled. The actual capacity is between 1300 and 1800, and the external standard is over 2800MA, 3200MA. Maybe the battery was dead when the merchant sold it to you, because the 18650 lithium battery was scrapped when it was fully charged. It is generally recommended to use a better one with a guard. If you use a flashlight, the battery capacity is around 1400~ 1800, and it is useless if it is high. Taobao's 3200MA capacity is virtual, so just buy it.