eleven、Redmi K40 series charging endurance test：Possibly the fastest 33W fast charge
The entire Redmi K40 series is equipped with a 4520mAh battery as standard，How the battery life based on different processor platforms has become a point of view。
Next, we conduct a specific test。
The author uses the Bilibili client to play online barrage videos，Mute，75%brightness。According to the monitored current information, it can be estimated that the online video battery life of the Redmi K40 under test conditions can reach about 12 hours.。
Under the same test conditions，According to the monitored current information, it can be estimated that the online video battery life of the Redmi K40 Pro under test conditions can reach about 8.2 hours。
All Redmi K40 series comes with a 33W charger，It takes 50 minutes to charge from 3% to 100%，It may be the fastest charging model with a charging power of about 30W that I have seen so far.。
twelve、Summarize：1999Yuan Redmi K40 is really "delicious"!
As we said in the preface，The Redmi K40 series only exists with a processor platform、The difference between the main camera and other fundamentals，Other parts remain highly consistent，So here we mainly look at the differences。
Let me talk about the performance part first，Thanks to Qualcomm's active response to dislocation competition，The Redmi K40 series completely abandoned the "entry version" mid-range machine，It is directly the dual flagship combination of Snapdragon 870 and Snapdragon 888。Since the Snapdragon 870 itself is the "ultimate overclocking version" of the Snapdragon 865，Overall Specifications、The architecture is basically the same as the Snapdragon 865 Plus，It's just that the main frequency of the super core has reached 3.2GHz，So it is called the "old and new combination" of the dual flagships.。
CPU side，Geekbench test results show，The single-core running score of the Snapdragon 888 on the Redmi K40 Pro is about 13% higher than that of the Snapdragon 870 on the Redmi K40，Multi-core test scores increased by about 10%。Under our test conditions，The energy efficiency ratio of the two CPUs is not much different，10% difference in single core，Multi-core gap 1%。
GPU side，GFXbench test results show，Compared with Snapdragon 870, Snapdragon 888 can improve by 36% in some high-load scenarios。The improvement rate of other test sub-items is at least about 20%。Under our test conditions，The energy efficiency ratio of Snapdragon 888 is about 20% behind that of Snapdragon 870。
Integrated CPU、GPU performance together，Redmi K40 Pro equipped with Snapdragon 888 has a higher limit performance limit，The Redmi K40 powered by the Snapdragon 870 has relatively restrained power consumption and energy efficiency ratio performance，The focus of the two is different，But there is no doubt that they are all at the top level of the Android camp。
video part，We didn't get the Redmi K40 Pro+ with Samsung HM2，Judging from the performance of Redmi K40 equipped with IMX582 and Redmi K40 Pro equipped with IMX686，They are not superior or inferior in most usage scenarios，It's just the purity of the K40 Pro's dark light screen、Image detail is better，The other sub-camera specifications are exactly the same，Needless to say。
Other aspects，Thanks to the upward climb of the Xiaomi brand，The Redmi K40 series has more room to play，In line with the big brother Xiaomi, it works hard on the screen - equipped with a 120Hz E4 AMOLED screen，Even got an "A+" rating from DisplayMate，There is no lack of matching automatic color temperature adjustment, etc.，achieved a considerable upgrade。
In general，Among the Redmi K40 series，Redmi K40 has become a particularly "fragrant" existence，Get an experience very similar to Redmi K40 Pro on a lower budget basis-an overview，The biggest difference that can be found is only a 36% increase in graphics processing capabilities of the 888 compared to the 870 in high-load scenarios。
For this series of models，Our buying advice is：Redmi K40 is suitable for the pursuit of extreme cost performance，Every penny is wisely spent；Redmi K40 Pro is suitable for those who are keen on extreme performance、The cost-effective flagship enthusiast who pays close attention to the parameters；Redmi K40 Pro+ is actually the super-large storage version of Redmi K40 Pro with the main camera replaced by Samsung HM2，Suitable for users who care about cost performance and have a relatively generous budget。