1, look at the movement: the core parts of the movement of the electric toothbrush, if the movement is broken, the electric toothbrush will no longer rotate independently, basically no difference with the manual toothbrush, but it can not be seen and touched, can not let the buyer disassemble the fuselage when buying it? Moreover, even if you open it, you can not tell good or bad.
Usually, we only judge the quality of the electric toothbrush by feeling the strength of the vibration of the electric toothbrush and observing the rotating speed, which is unscientific, mainly to see the manufacturer of the movement. The common movements on the market generally have domestic movements and German movements.
In contrast, it is still recommended that you start with the movement developed in Germany, the price will be more expensive, but the quality is really much better. This is not to say that the domestic is not good, but China's electric toothbrush started late, and the current maturity of the movement is still a certain gap with the manufacturing power.
2. Look at rechargeable batteries
The rechargeable battery is an important part of the electric toothbrush. If the automatic discharge of the battery is low and the number of cycles is more, it will naturally prove that the battery performance is better and the electric toothbrush is more durable. At present, the rechargeable batteries commonly used in electric toothbrushes on the market are nickel-cadmium batteries, nickel-metal hydride batteries and lithium batteries.
Before introducing these three batteries, Minimalist first gives you a professional term in the field of batteries: memory effect. I believe many people have not even heard of it. What does it mean to have a memory effect?
In popular terms, the battery with memory effect must be consumed every time before it can be charged again, otherwise it will cause irreversible damage to the battery.
Nickel-cadmium battery is a DC power supply battery, early mobile phones are used this battery, if not handled properly during the charging process, there will be serious memory effects. From the performance point of view, the number of 500 charging cycles is less, the self-discharge of nickel-cadmium battery is relatively large, there is 20% self-discharge per month, and it is easy to bulge and leak. Nickel-metal hydride batteries are designed from nickel-cadmium batteries, but great progress has been made in improving the memory effect of nickel-cadmium batteries, but the memory effect has not been completely eliminated, and there is a slight memory effect, about 1000 charging cycles.
Lithium battery electric toothbrush, in terms of battery power, battery energy, charging speed and so on, has comprehensively surpassed nickel-metal hydride batteries. Light urinal body and more environmentally friendly properties, more than 2000 times, low self-discharge rate, performance: lithium battery electric toothbrush > Nimh battery electric toothbrush > Nickel-cadmium battery electric toothbrush.
Although most of the current electric toothbrushes support long-term wireless charging base, with the charge, but the nickel-metal hydride battery still has a small memory effect that can not be ignored, and lithium batteries will be the mainstream of the future electric toothbrush, so in the selection of electric toothbrushes, it is recommended to choose the use of more cycles of charging, less self-discharge lithium battery products.
3, look at the waterproof level
When choosing an electric toothbrush, the waterproof level is the key thing we have to consider. We often see IPX plus a number expression, it represents the waterproof level.
The higher the number, the stronger the waterproof ability, the general electric toothbrush waterproof level is IPX5, that is, it can accept washing, and for IPX7 waterproof level electric toothbrush, not only can be washed, but also will not cause too much impact after soaking.
01 Sonic or Rotary?
The current mainstream electric toothbrushes are divided into two categories - rotary and lateral swing.
02 Vibration frequency
Of course, I rarely use a rotary electric toothbrush, after all, it is too noisy to use a rotary electric toothbrush in the dead of night. If you choose a vibrating electric toothbrush like me, the first thing to consider is the vibration frequency.
03 Bristle quality
The third point to consider is the quality of the bristles, after all, the bristles are in direct contact with the teeth, if the use of inferior bristles, not only the brush is not clean, but also may cause unnecessary wear to the teeth. Among them, the grinding rate is the key.