The quality of the Sanshi charger is decent. It uses constant voltage and constant current LM358. The current is very stable during the constant current phase, and the current drops very smoothly when changing from constant current to constant current. constant voltage. It's a very good charger.
18650 is a standard lithium-ion battery model defined by the Japanese company SONY, the creator of lithium-ion batteries, in order to reduce costs. 18 means the diameter is 18mm and 65 means the length 65mm, 0 means cylindrical battery.
It is generally believed that when the no-load voltage of a lithium battery is lower than 3.0V, it is considered exhausted (the specific value depends on the threshold value of the battery protection board). battery, such as as low as 2.8 V and 3.2 V). When discharging most lithium batteries, the no-load voltage cannot be lowered below 3,2V, otherwise over-discharge will damage the battery (generally, lithium batteries on the market are mainly used with protection plates, so over-discharge will also cause the protection plate to fail to detect the battery, resulting in makes it impossible to charge the battery).
It is generally believed that when the no-load voltage of a lithium battery is lower than 3.0V, it is considered exhausted (the specific value depends on the threshold value of the battery protection board). battery, such as as low as 2.8 V and 3.2 V). When discharging most lithium batteries, the no-load voltage cannot be lowered below 3.2V, otherwise excessive discharge will damage the battery (generally, lithium batteries on the market are mainly used with protection plates, so excessive discharge will also cause the protection plate to failas to detect the battery, making it impossible to charge the battery).