Redmi AirDots S Review: Hands-on Unboxing and Teardown

ByJoe Horner 2020-05-04 924

Like the upgrade of Xiaomi Mi Air 2s TWS, Redmi recently launched an upgraded version of Redmi Airdots's, Redmi Airdots S true wireless Bluetooth headset. The price and appearance of the Redmi Airdots S are the same as those of the previous Redmi Airdots, with the addition of a low-latency game mode. What are the internal upgrades of this low-budget Redmi Airdots S TWS earbuds, times have changed, and how competitive it is? Now, let's take a look at the following detailed hands-on review.

Redmi AirDots S Unboxing

The packaging style is the same as Xiaomi's other TWS headset products, the long-strip box, blue-and-white tone, the front is the rendering of the headset and charging box, the product name: Redmi Airdots S true wireless Bluetooth headset.

On the back of the box is part of the product information, product model: TWSEJ05LS, single headset battery capacity 43mAh, charging box battery capacity 300mAh, talk time about 4 hours, support Bluetooth 5.0, no difference with the previous generation.

 

Items in the box: headphones and charging box, with two pairs of silicone earplugs of different sizes. And operating instructions.

 

At the top of the charging box, the Logo, box printed with Redmi is made of plastic and has a frosted feel on the surface.

 

Product information at the bottom of the charging box, Redmi AirDots S true wireless Bluetooth headset, product model TWSEJ05LS, headset input parameters: 5V100mA, charging box input parameters: 5V500mA, charging box output parameters: 5V 150mA.

 

There is a Micro-USB charging interface on the back of the headset charging box.

 

The LED indicator on the headset flashes red when charging.

 

The total weight of the headset and charging box is 35.1 grams.

 

The unit weight of the charging box is 27.1 grams.

 

The left and right headphones weigh 8.1 grams.

 

The wired charging test of Redmi AirDots S is carried out with ChargerLAB POWER-Z KT001, and the power is about 1.2W.

 

 

Redmi AirDots S Teardown

Pry open the Redmi AirDots S charging cockpit, the battery is located at the bottom of the charging box, and the internal motherboard is secured by three screws.

 

On the inside of the Redmi AirDots S charging cockpit, there are five magnets, four of which attach fixed headphones and the lower one absorbs the charging box lid.

 

Remove the battery and motherboard from the charging box.

 

The battery model of the charging box is PL501340, capacity 300mAhshock 1.11Whh, rated voltage 3.7V, which is consistent with the previous generation Redmi AirDots. The production date is November 28, 2019.

 

Next, let's disassemble some of the headphones. The appearance of the Redmi AirDots S headphones is the same as that of the previous Redmi AirDots. They are all ear-in designs and are relatively small in size.

 

The headset supports press control, and the front end has a hidden LED indicator.

 

The microphone at the front of the headset has a hole, which is mainly used to pick up the voice of the person speaking during the call.

 

Take off the silicone sleeve and there is a tuning hole near the soundhole.

 

CMIIT ID code is printed on the shell near the soundhole.

 

The charging contact board and two magnets in the inner cover of the headset are used to assist the charging positioning.

 

Size comparison between headphone soft bag battery and 1 RMB coin.

 

The battery model of the Redmi AirDots S is 541112 and the capacity is 0.16H, which is the same as that of the previous generation Redmi AirDots.

 

On the front of the motherboard, there is an IC, two LED indicators, and fretting buttons, and on the right is a patch Bluetooth antenna.

 

The back of the motherboard is mainly the main control chip and MEMS silicon wheat.

 

Silk screen M15 J66 IC, this is the headset built-in battery protection chip.

 

The main control chip is REALTEK RTL8763BFR, which is REALTEK's first TWS Bluetooth headset chip that supports AI wake-up. It supports Bluetooth 5.0, HFP 1.7, HSP 1.2, A2DP 1.3, AVRCP 1.6 SPP 1.2 and PBAP 1.0, and has binaural call function.

 

RTL8763BFR has a 32-bit ARM processor, 24-bit DSP, runs at the highest frequency of 160MHz, and has built-in 8Mbits Flash memory. It also has built-in lithium battery charge management, built-in over-voltage, over-current, under-voltage protection, and other battery protection devices. In terms of expansibility, it supports three LED drivers, touch IC control, analog and digital microphone input, and dual microphones.

 

It is understood that at present, a number of products of Xiaomi, Anker, FIIL, QCY, and other brands have adopted REALTEK's TWS headphone program.

 

Conclusion: 

From the hardware level of disassembly, the Redmi AirDots S true wireless Bluetooth headset is different from the previous Redmi AirDots, one is that the Logo on the charge box has changed from Xiaomi's icon to Redmi, and the second is the official propaganda that three buttons can be pressed to open the game mode to reduce the transmission delay. It is not known whether Redmi AirDots will get this function through a firmware upgrade.

In addition, both generations of AirDots use the REALTEK RTL8763BFR master chip, which supports Bluetooth 5.0, dual-channel stereo, and binaural calls. The headset can be pressed twice to wake up the voice assistant, the headset supports IPX4 waterproof, the battery capacity of the headset is 0.16Wh/h, the battery capacity of the charging box is 300mAhmax 1.11Whh, and the battery life can reach 4h+12h.


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