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Today: 26 January 2021, Tuesday.

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#1

 

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Description Oxidative stress plays a role in the progression of chronic heart failure (CHF). We investigated whether systemic oxidative stress is linked to exercise intolerance and skeletal muscle abnormalities in patients with CHF. We recruited 30 males: 17 CHF patients, 13 healthy controls. All participants underwent blood testing, cardiopulmonary exercise testing, and magnetic resonance spectroscopy (MRS). The serum thiobarbituric acid reactive substances (TBARS; lipid peroxides) were significantly higher (5.1 ± 1.1 vs. 3.4 ± 0.7 μmol/L, p < 0.01) and the serum activities of superoxide dismutase (SOD), an antioxidant, were significantly lower (9.2 ± 7.1 vs. 29.4 ± 9.7 units/L, p < 0.01) in the CHF cohort versus the controls. The oxygen uptake (VO2) at both peak exercise and anaerobic threshold was significantly depressed in the CHF patients; the parameters of aerobic capacity were inversely correlated with serum TBARS and positively correlated with serum SOD activity. The phosphocreatine loss during plantar-flexion exercise and intramyocellular lipid content in the participants' leg muscle measured by 31phosphorus- and 1proton-MRS, respectively, were significantly elevated in the CHF patients, indicating abnormal intramuscular energy metabolism. Notably, the skeletal muscle abnormalities were related to the enhanced systemic oxidative stress. Our analyses revealed that systemic oxidative stress is related to lowered whole-body aerobic capacity and skeletal muscle dysfunction in CHF patients.

#Energy
Field # Energy
Updated 26 January 2021

#2

 

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Description Oppo has launched a new smartphone in China called the A55 5G that is powered by a MediaTek Dimensity 700 processor.

#Energy
Field # Energy
Updated 25 January 2021

#3

 

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Description TBD

#Energy
Field # Energy
Updated 25 January 2021

#4

 

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Description Biohybrids composed of microorganisms and nanoparticles have emerged as potential systems for bioenergy and high-value compound production from CO2 and light energy, yet the cellular and metabolic processes within the biological component of this system are still elusive. Here we dissect the biohybrid composed of the anaerobic acetogenic bacterium Moorella thermoacetica and cadmium sulphide nanoparticles (CdS) in terms of physiology, metabolism, enzymatics and transcriptomic profiling. Our analyses show that while the organism does not grow on l-cysteine, it is metabolized to acetate in the biohybrid system and this metabolism is independent of CdS or light. CdS cells have higher metabolic activity, despite an inhibitory effect of Cd2+ on key enzymes, because of an intracellular storage compound linked to arginine metabolism. We identify different routes how cysteine and its oxidized form can be innately metabolized by the model acetogen and what intracellular mechanisms are triggered by cysteine, cadmium or blue light.

#Energy
Field # Energy
Updated 25 January 2021

#5

 

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Description Understanding fluid flow in shale rocks is critical for the recovery of unconventional energy resources. Despite the extensive research conducted on water and oil flow in shales, significant uncertainties and discrepancies remain in reported experimental data. The most noted being that while oil spreads more than water on shale surfaces in an inviscid medium, its uptake by shale pores is much less than water during capillary flow. This leads to misjudgement of wettability and the underlying physical phenomena. In this study, therefore, we performed a combined experimental and digital rock investigation on an organic-rich shale including contact angle and spontaneous imbibition, X-ray and neutron computed tomography, and small angle X-ray scattering tests to study the potential physical processes. We also used non-equilibrium thermodynamics to theoretically derive constitutive equations to support our experimental observations. The results of this study indicate that the pre-existing fractures (first continuum) imbibe more oil than water consistent with contact angle measurements. The overall imbibition is, however, higher for water than oil due to greater water diffusion into the shale matrix (second continuum). It is shown that more water uptake into shale is controlled by pore size and accessibility in addition to capillary or osmotic forces i.e. configurational diffusion of water versus oil molecules. While the inorganic pores seem more oil-wet in an inviscid medium, they easily allow passage of water molecules compared to oil due to the incredibly small size of water molecules that can pass through such micro-pores. Contrarily, these strongly oil-wet pores possessing strong capillarity are restricted to imbibe oil simply due to its large molecular size and physical inaccessibility to the micro-pores. These results provide new insights into the previously unexplained discrepancy regarding water and oil uptake capacity of shales.

#Energy
Field # Energy
Updated 25 January 2021

#6

 

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Description Ferroelectricity in bulk crystals of hafnium oxide demonstrates that these properties are not limited to films prepared by thin-film deposition techniques.

#Energy
Field # Energy
Updated 25 January 2021

#7

 

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Description ​​Announcing the international coalition during its week-long online Davos Agenda Summit 2021, the World Economic Forum (WEF) said it would work towards improving racial and ethnic justice in the workplace.

#Energy
Field # Energy
Updated 25 January 2021

#8

 

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Description Today, natural gas and coal combustion supply most demand for industrial process heat (IPH), or the transfer of heat to a material within a production process. With the emergence of low-cost solar photovoltaic (PV) technologies, ...

#Energy
Field # Energy
Updated 25 January 2021

#9

 

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Description Currently, there is a rapid, fundamental transformation of energy systems with new technologies developing at an accelerated pace. It is clear that nuclear energy will be part of the global energy mix for decades to come, ...

#Energy
Field # Energy
Updated 25 January 2021

#10

 

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Description The widespread adoption of battery electric vehicles offers the greatest energy efficiency and potential for CO2 reduction, new analysis by Cambridge engineers has shown.

#Energy
Field # Energy
Updated 25 January 2021

#11

 

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Description The new Oppo A55 5G is priced in China at CNY 1,599 (roughly Rs. 18,000) for the lone 6GB RAM + 128GB storage option. It is available in Brisk Blue and Rhythm Black colour options. The phone is up for grabs via several online retailers in China including JD, Tmall, and Suning.

#Energy
Field # Energy
Updated 25 January 2021

#12

 

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Description Due to heatwaves, the pandemic, and wildfires across much of the country, energy usage increased nationwide for an increase of $1.21 billion in costs.

#Energy
Field # Energy
Updated 24 January 2021

#13

 

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Description The Motorola One 5G Ace comes in at $400 and has a lot to offer -- but can it compete with the likes of the Pixel 4a and iPhone SE?

#Energy
Field # Energy
Updated 24 January 2021

#14

 

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Description TBD

#Energy
Field # Energy
Updated 24 January 2021

#15

 

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Description The company behind a new battery isn't saying much, but we figured a few things out.

#Energy
Field # Energy
Updated 23 January 2021

#16

 

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Description MacBook users, read on to learn how to conserve battery life and maximize performance.

#Energy
Field # Energy
Updated 23 January 2021

#17

 

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Description InBody-770 and SECA mBCA 515 are multifrequency bioelectrical impedance analysis (BIA) devices, which are commonly used in the clinic to assess fat-free mass (FFM) and body fat (BF). However, the accuracy between devices in clinical settings, across different body mass index (BMI) groups remains unclear. Body composition for 226 participants (51% men, aged 18–80 years, BMI 18–56 kg/m²) was assessed by two commercial multifrequency BIA devices requiring standing position and using eight-contact electrodes, InBody 770 and SECA mBCA 515, and compared to results from dual-energy X-ray absorptiometry (DXA). Measurements were performed in a random order, after a 3 h fast and no prior exercise. Lin’s-concordance correlation and Bland–Altman analyses were used to compare between devices, and linear regression to assess accuracy in BF% across BMI groups. We found strong correlation between DXA results for study population BF% and those obtained by InBody (ρc = 0.922, 95% confidence interval (CI) 0.902, 0.938) and DXA and SECA (ρc = 0.940, CI 0.923, 0.935), with 95% limits of agreements between 2.6 and −8.9, and 7.1 and −7.6, respectively. BF% assessment by SECA was similar to DXA (−0.3%, p = 0.267), and underestimated by InBody (−3.1%, p < 0.0001). InBody deviations were largest among normal weight people and decreased with increasing BMI group, while SECA measurements remained unaffected. Both BIA devices agreed well with BF% assessment obtained by DXA. Unlike SECA, InBody underestimated BF% in both genders and was influenced by BMI categories. Therefore, in clinical settings, individual assessment of BF% should be taken with caution.

#Energy
Field # Energy
Updated 22 January 2021

#18

 

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Description What do tomatoes, hemp and hydrogen gas have in common? Only one thing: they were all victims of misinformation that banned their use. Harmless products that could have had a positive role in the economy and society were ...

#Energy
Field # Energy
Updated 22 January 2021

#19

 

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Description There's a lot going on in addition to some of Biden's high-profile moves.

#Energy
Field # Energy
Updated 22 January 2021

#20

 

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Description The international thermonuclear experimental reactor (ITER) is a worldwide project currently being built in France for the demonstration of the feasibility of thermonuclear technologies for future realization of successful commercial fusion energy. ITER is of the tokamak based design using strong magnetic fields to confine the very hot plasma needed to induce the fusion reaction. Tokamak devices are currently the front leading designs. Building a successful magnetic fusion device for energy production is of great challenge. A key obstacle to such design is the performance during abnormal events including plasma disruptions and so-called edge-localized modes (ELMs). In these events, a massive and sudden release of energy occurs quickly, due to loss of full or partial plasma confinement, leading to very high transient power loads on the reactor surface boundaries. A successful reactor design should tolerate several of these transient events without serious damages such as melting and vaporization of the structure. This paper highlights, through comprehensive state-of-the-art computer simulation of the entire ITER interior design during such transient events, e.g., ELMs occurring at normal operation and disruptions during abnormal operation, potential serious problems with current plasma facing components (PFCs) design. The HEIGHTS computer package is used in these simulations. The ITER reactor design was simulated in full and exact 3D geometry including all known relevant physical processes involved during these transient events. The current ITER divertor design may not work properly and may requires significant modifications or new innovative design to prevent serious damage and to ensure successful operation.

#Energy
Field # Energy
Updated 22 January 2021

#21

 

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Description High-precision metal cutting is increasingly relevant in advanced applications. Such precision normally requires a cutting feed in the micron or even sub-micron dimension scale, which raises questions about applicability of concepts developed in industrial scale machining. To address this challenge, we have developed a device to perform linear cutting with force measurement in the vacuum chamber of an electron microscope, which has been utilised to study the cutting process down to 200 nm of the feed and the tool tip radius. The machining experiments carried out in-operando in SEM have shown that the main classical deformation zones of metal cutting: primary, secondary and tertiary shear zones—were preserved even at sub-micron feeds. In-operando observations and subsequent structural analysis in FIB/SEM revealed a number of microstructural peculiarities, such as: a substantial increase of the cutting force related to the development of the primary shear zone; dependence of the ternary shear zone thickness on the underlaying grain crystal orientation. Measurement of the cutting forces at deep submicron feeds and cutting tool apex radii has been exploited to discriminate different sources for the size effect on the cutting energy (dependence of the energy on the feed and tool radius). It was observed that typical industrial values of feed and tool radius imposes a size effect determined primarily by geometrical factors, while in a sub-micrometre feed range the contribution of the strain hardening in the primary share zone becomes relevant.

#Energy
Field # Energy
Updated 22 January 2021

#22

 

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Description Realme C20 has been launched in Vietnam. The phone is priced at VND 2,490,000 (roughly Rs. 7,800) until February 11. It comes in Blue and Gray colour options and will be available in the market on January 23. Realme C20 runs on the dated Android 10 software.

#Energy
Field # Energy
Updated 22 January 2021

#23

 

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Description A team of scientists at Stanford have found a way to stabilize perovskite, a natural mineral, setting the groundwork for more efficient solar panels.

#Energy
Field # Energy
Updated 22 January 2021

#24

 

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Description The past 30 years have seen progress in the development of Pt-based nanocatalysts for the oxygen reduction reaction, and some are now in production on a commercial basis and used for polymer electrolyte fuel cells (PEFCs) for automotives and other applications. Further improvements in catalytic activity are required for wider uptake of PEFCs, however. In laboratories, researchers have developed various catalysts that have much higher activities than commercial ones, and these state-of-the-art catalysts have potential to improve energy conversion efficiencies and reduce the usage of platinum in PEFCs. There are several technical issues that must be solved before they can be applied in fuel cell vehicles, which require a high power density and practical durability, as well as high efficiency. In this Review, the development history of Pt-based nanocatalysts and recent analytical studies are summarized to identify the origin of these technical issues. Promising strategies for overcoming those issues are also discussed. This Review summarizes the development history of Pt-based nanocatalysts and recent analytical studies to identify the technical issues in the automobile application, proposing promising strategies for overcoming the trade-offs among the efficiency,power density, and durability of polymer electrolyte fuel cells.

#Energy
Field # Energy
Updated 21 January 2021

#25

 

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Description Metal fluorides, promising lithium-ion battery cathode materials, have been classified as conversion materials due to the reconstructive phase transitions widely presumed to occur upon lithiation. We challenge this view by studying FeF3 using X-ray total scattering and electron diffraction techniques that measure structure over multiple length scales coupled with density functional theory calculations, and by revisiting prior experimental studies of FeF2 and CuF2. Metal fluoride lithiation is instead dominated by diffusion-controlled displacement mechanisms, and a clear topological relationship between the metal fluoride F− sublattices and that of LiF is established. Initial lithiation of FeF3 forms FeF2 on the particle’s surface, along with a cation-ordered and stacking-disordered phase, A-LixFeyF3, which is structurally related to α-/β-LiMn2+Fe3+F6 and which topotactically transforms to B- and then C-LixFeyF3, before forming LiF and Fe. Lithiation of FeF2 and CuF2 results in a buffer phase between FeF2/CuF2 and LiF. The resulting principles will aid future developments of a wider range of isomorphic metal fluorides. Metal-fluoride-based lithium-ion battery cathodes are typically classified as conversion materials because reconstructive phase transitions are presumed to occur upon lithiation. Metal fluoride lithiation is now shown to be dominated instead by diffusion-controlled displacement mechanisms.

#Energy
Field # Energy
Updated 21 January 2021

#26

 

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Description The way to boost electron transfer in grid-scale batteries is different than researchers had believed, a new study from the University of Michigan has shown. The findings are a step toward being able to store renewable energy ...

#Energy
Field # Energy
Updated 21 January 2021

#27

 

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Description Infinix Hot 10 Play has been launched in the Philippines and is an entry-level smartphone. It features a dual rear camera setup and a notch for the selfie camera.

#Energy
Field # Energy
Updated 21 January 2021

#28

 

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Description TBD

#Energy
Field # Energy
Updated 21 January 2021

#29

 

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Description Samsung Galaxy M12 or Galaxy F12 specifications have been leaked by a tipster. The budget smartphone is said to feature a 6.5-inch HD+ TFT LCD panel, Exynos 850 SoC, and a large 6,000mAh battery, as per the leak.

#Energy
Field # Energy
Updated 21 January 2021

#30

 

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Description TBD

#Energy
Field # Energy
Updated 21 January 2021

#31

 

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Description The video is literally just called "Making Batteries," but it's a cool peek behind the curtains of the process of making lithium-ions batteries.

#Energy
Field # Energy
Updated 21 January 2021

#32

 

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Description Lithium-ion batteries power the world, but with lithium running low, we desperately need a viable alternative. Here’s why common salt may be our best bet

#Energy
Field # Energy
Updated 21 January 2021

#33

 

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Description Samsung Galaxy S21 Ultra teardown video has been posted by a YouTube channel, highlighting difficulties in replacing its AMOLED display and battery pack. The teardown video also shows different components of the latest Samsung flagship.

#Energy
Field # Energy
Updated 21 January 2021

#34

 

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Description The EPA has to consider "suspending, revising, or rescinding" the weaker rules.

#Energy
Field # Energy
Updated 21 January 2021

#35

 

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Description NUP98 is one of the most promiscuous fusion partners involved in leukemogenic chromosomal translocations, but the myriad of partners has long obfuscated the mechanism by which these fusion proteins drive leukemia. A new mass spectrometry–based approach has produced clues that suggest an entirely new model of leukemogenesis.

#Energy
Field # Energy
Updated 21 January 2021

#36

 

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Description TBD

#Energy
Field # Energy
Updated 20 January 2021

#37

 

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Description Artificial photosynthesis of H2O2 from H2O and O2, as a spotless method, has aroused widespread interest. Up to date, most photocatalysts still suffer from serious salt-deactivated effects with huge consumption of photogenerated charges, which severely limit their wide application. Herein, by using a phenolic condensation approach, carbon dots, organic dye molecule procyanidins and 4-methoxybenzaldehyde are composed into a metal-free photocatalyst for the photosynthetic production of H2O2 in seawater. This catalyst exhibits high photocatalytic ability to produce H2O2 with the yield of 1776 μmol g−1h−1 (λ ≥ 420 nm; 34.8 mW cm−2) in real seawater, about 4.8 times higher than the pure polymer. Combining with in-situ photoelectrochemical and transient photovoltage analysis, the active site and the catalytic mechanism of this composite catalyst in seawater are also clearly clarified. This work opens up an avenue for a highly efficient and practical, available catalyst for H2O2 photoproduction in real seawater. It is a challenge to produce hydrogen peroxide in seawater by photocatalysis. Here, the authors design and synthesize a metal-free photocatalyst based on carbon dots with a salt-protective electron sink effect, which exhibits enhanced hydrogen peroxide photoproduction in real seawater.

#Energy
Field # Energy
Updated 20 January 2021

#38

 

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Description All-inorganic CsPbI3 perovskite quantum dots have received substantial research interest for photovoltaic applications because of higher efficiency compared to solar cells using other quantum dots materials and the various exciting properties that perovskites have to offer. These quantum dot devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. We demonstrate higher mechanical endurance of quantum dot films compared to bulk thin film and highlight the importance of further research on high-performance and flexible optoelectronic devices using nanoscale grains as an advantage. Specifically, we develop a hybrid interfacial architecture consisting of CsPbI3 quantum dot/PCBM heterojunction, enabling an energy cascade for efficient charge transfer and mechanical adhesion. The champion CsPbI3 quantum dot solar cell has an efficiency of 15.1% (stabilized power output of 14.61%), which is among the highest report to date. Building on this strategy, we further demonstrate a highest efficiency of 12.3% in flexible quantum dot photovoltaics. Perovskite quantum dots film has better mechanical stability and structural integrity compared to bulk thin film. Here, the authors demonstrate higher endurance of quantum dot films and develop hybrid CsPbI3 QD/PCBM device with PCE of 15.1% and 12.3% on rigid and flexible substrates, respectively.

#Energy
Field # Energy
Updated 20 January 2021

#39

 

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Description The highlight of the Vivo Y31 is its 48-megapixel AI Triple rear camera setup. Here's all you need to know about it.

#Energy
Field # Energy
Updated 20 January 2021

#40

 

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Description Oppo Find X3 Pro specifications have been revealed through an FCC certification listing. The smartphone was listed in the database with the model number CPH2173. Oppo Find X3 is expected to run on Android 11, pack a dual-cell 4,450mAh battery, and support 65W flash charge fast charging.

#Energy
Field # Energy
Updated 20 January 2021

#41

 

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Description Over the past few years, researchers have been trying to develop new designs for perovskite solar cells that could improve their performance, efficiency and stability over time. One possible way of achieving this is to combine ...

#Energy
Field # Energy
Updated 19 January 2021

#42

 

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Description There are high hopes for the next generation of high energy-density lithium metal batteries, but before they can be used in our vehicles, there are crucial problems to solve. An international research team led by Chalmers ...

#Energy
Field # Energy
Updated 19 January 2021

#43

 

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Description Until recently, rooftop solar panels were a clean energy technology that only wealthy Americans could afford. But prices have dropped, thanks mostly to falling costs for hardware, as well as price declines for installation ...

#Energy
Field # Energy
Updated 19 January 2021

#44

 

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Description A Tokyo Tech research team led by Specially Appointed Professor Takuya Oda of the Institute of Innovative Research and Professor Keisuke Tanaka of the School of Computing, in collaboration with Mitsubishi Electric Corporation, ...

#Energy
Field # Energy
Updated 19 January 2021

#45

 

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Description Israeli startup StoreDot has produced engineering samples of battery cells that charge in just five minutes.

#Energy
Field # Energy
Updated 19 January 2021

#46

 

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Description Samsung Galaxy S21 has undergone a detailed teardown process. YouTuber PBKreviews has published the Samsung Galaxy S21 teardown video on his channel. The video reveals that the phone has a plastic back panel that needs to be removed using heat and a pry pick. The internals reveal that there are foam balls in the top and bottom speaker modules and that helps in making the sound bigger than the original output. At the top, there&rsquo;s a wireless charging cable that can easily be disconnected.

#Energy
Field # Energy
Updated 19 January 2021

#47

 

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Description Redmi K40 battery life has been teased through a screenshot posted by Redmi General Manager Lu Weibing. The screenshot also suggests that the Redmi K40 smartphone would come with full-HD+ display.

#Energy
Field # Energy
Updated 19 January 2021

#48

 

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Description Redmi K40 has been teased to last over 35 hours on a single charge by the company.

#Energy
Field # Energy
Updated 19 January 2021