Today I will discuss the life hacking with a battery, which can be useful in the life of any person. It's about how to determine whether or not the battery is charged, without using any special tools.
For example, I took two batteries, one charged (right), another low. This confirms the meter performance.
To determine whether or not the battery is charged to raise it enough 3 cm above the flat surface and release. A charged battery will not fall and land exactly as pictured.
A discharged It bounces off became and fall, It is also seen in the photo.
In this way it is possible one-time check the battery level, if circumstances so require. Of course, all battery status verification methods in which no special equipment has a high risk of error. If you still often should this procedure, you will need
multimeter. The more prices will start from 50 rubles for all well-known Chinese site. Example budget multimeter on the photo. Like this - put a thumbs up!