How many 18650 batteries do you have? How do you make the best use of them?

When you start playing with your flashlight, you'll find that most flashlights are actually for decoration. Battery recycling line They don't use much, and a bunch of batteries are wasted. If you don't use the batteries for a long time, they will break down. Do these batteries work? The answer is yes, and today I'd like to take a moment to tell you about some interesting gadgets that appeared in 18650.

Bluetooth speaker

A few years ago, there were a large number of Bluetooth speakers using 18650 lithium batteries on the market, Battery recycling line and it is difficult to buy them now. Most Bluetooth speakers are powered by a built-in polymer battery. Bluetooth speakers are mostly gray. After a while, you will find that the battery is dead. It is difficult for ordinary people to replace batteries. So I prefer things with replaceable batteries, and I'm not afraid to collect batteries for a long time. This Bluetooth speaker has the functions of clock, alarm clock, thermometer, TF card playing and so on. It can be a pendulum when it is not needed:

USE TWO 18650 lithium batteries, lithium batteries parallel connection, battery cover can be opened, ready to replace. The primary battery capacity is low, it is recommended to replace the high-capacity Battery to extend battery life. mounting machine The speaker comes with a Micro-USB charging port that allows you to charge without removing the battery:

This Bluetooth speaker is relatively small, with low power consumption and average sound quality. lithium battery welding machine Fortunately, it has many functions and is not expensive. It's hard to find a Bluetooth speaker with a detachable 18650 battery these days. What you can find is the appearance of a singing machine like Sundwanlida: