Genuine-spec Touch Bar assembly with integrated flex cable for 2020 MacBook Pro 13″ models (A2251, A2289, A2338)—restores full Touch ID and Touch Bar functionality with OEM-level fit and performance. Compatible With: MacBook Pro 13″ (2020): A2251 (Intel Core i5/i7, two Thunderbolt ports) A2289 (Intel Core i5/i7, four Thunderbolt ports) A2338 (Apple M1 chip, two Thunderbolt ports) MacBook Pro 13″ (2020): A2251 (Intel Core i5/i7, two Thunderbolt ports) A2289 (Intel Core i5/i7, four Thunderbolt ports) A2338 (Apple M1 chip, two Thunderbolt ports) A2251 (Intel Core i5/i7, two Thunderbolt ports) A2289 (Intel Core i5/i7, four Thunderbolt ports) A2338 (Apple M1 chip, two Thunderbolt ports) Includes: Complete Touch Bar module with integrated flex cable, Touch ID sensor, and ambient light sensor—ready for direct connection to the logic board. Functionality: Fully restores dynamic Touch Bar controls, system functions, app shortcuts, and Touch ID (fingerprint authentication and power button). OEM-Quality Build: Matches Apple’s original design in responsiveness, finish, and sensor alignment—ensures seamless integration with macOS. Color Options: Available in Space Gray and Silver to match your MacBook’s top case (confirm your model’s color before ordering). Installation Note: Requires full top case disassembly and careful handling of adhesive and connectors. The flex cable routes under the speakers and connects near the logic board—precision is essential. Recommended for experienced technicians.
The ViewSonic VA2708-2K-MHD is a 27-inch monitor featuring a SuperClear IPS panel with QHD resolution (2560 × 1440). The higher resolution provides more screen space and sharper image quality compared to standard Full HD displays, making it suitable for office work, content consumption, and everyday productivity. The monitor supports a refresh rate of up to 100Hz. As a result, scrolling, video playback, and general desktop use appear smoother than on traditional 60Hz displays. In addition, the display offers a 1ms MPRT response time to help reduce perceived motion blur. The IPS panel provides wide 178° horizontal and vertical viewing angles. Therefore, colors and brightness remain more consistent when viewed from different positions. ViewSonic includes built-in stereo speakers for basic audio playback. This eliminates the need for external speakers in many office and home environments. Connectivity includes HDMI, DisplayPort, and VGA inputs, allowing compatibility with modern and legacy devices. The monitor also supports VESA wall mounting for flexible installation options. The VA2708-2K-MHD focuses on sharp QHD image quality, smooth 100Hz performance, and versatile connectivity for everyday computing tasks. Specifications: 2K QHD 2560 X 1440 resolution SuperClear® IPS panel 100Hz Variable refresh rate delivers fluid visuals 1ms (MPRT) response time for precision HDR10 Delivers Stellar Contrast and Color Accuracy
A reliable, budget-friendly Genius KM-100SE wired keyboard and mouse combo featuring a spill-resistant keyboard, ergonomic design, and plug-and-play USB connectivity—ideal for home, office, or classroom use. Spill-resistant design with drainage holes to protect against accidental liquid damage Quiet, low-profile keys with standard layout (including numeric keypad) for comfortable typing Durable construction with a lifespan of up to 10 million keystrokes Integrated wrist rest for improved ergonomics during long sessions Ambidextrous 3-button design with scroll wheel 1000 DPI optical sensor for smooth, precise tracking on most surfaces Ergonomic shape for comfortable right- or left-handed use Plug-and-play USB connection—no drivers required Compatible with Windows, macOS, Linux, and ChromeOS 1.5-meter braided cable for tangle resistance and durability
Are you looking to upgrade your monitor for a better viewing experience? The MSI Modern MD272QXPW 27″ 100Hz monitor is the perfect choice. It offers vibrant visuals, smooth performance, and a sleek design. Firstly, let’s talk about the display quality. The 27-inch screen provides ample space for multitasking and immersive viewing. With a resolution of 2560×1440, you get sharp and detailed images. Colors are vivid and true to life, making your content pop. Moreover, the 100Hz refresh rate ensures smooth and fluid visuals. Whether you’re watching videos or playing games, the higher refresh rate reduces motion blur. This results in a more enjoyable and comfortable viewing experience. The MSI Modern MD272QXPW also boasts excellent ergonomics. The adjustable stand allows you to tilt, swivel, and adjust the height. This ensures you can find the most comfortable position for long hours of use. Another great feature is the blue light filter. This reduces eye strain during extended use. Whether you’re working late or enjoying a movie marathon, your eyes will thank you. Additionally, the monitor includes multiple connectivity options. With HDMI, DisplayPort, and USB-C ports, you can easily connect various devices. This versatility makes it suitable for work, gaming, or multimedia consumption. Design-wise, the MSI Modern MD272QXPW is sleek and modern. Its slim bezels provide a clean and minimalist look. This makes it a great addition to any workspace or home setup. In conclusion, the MSI Modern MD272QXPW 27″ 100Hz monitor is an excellent choice for anyone looking to enhance their viewing experience. With its vibrant display, smooth performance, and ergonomic design, it meets all your needs. Upgrade your monitor today and enjoy a better visual experience! Specifications: Display : 27″ IPS Resolution : 2560 x 1440 (WQHD) Refresh Rate : 100Hz Response Rate : 1ms MRPT
WIWU SW03 Sports Smart Watch - Vermilion | Fitness Tracking, Heart Rate Monitoring, Sleep Analysis | Waterproof, Long Battery Life | Compatible with iPhone, Android, iPad, and Tablets WIWU SW03 Sports Smart Watch – Vermilion | Fitness Tracking, Heart Rate Monitoring, Sleep Analysis | Waterproof, Long Battery Life | Compatible with iPhone, Android, iPad, and Tablets WIWU SW03 Sports Smart Watch : Display: 1.28-inch TFT LCD, 240×240 resolution (full-round display) Sport Modes: 13 sport modes for fitness tracking Health Monitoring: Heart rate monitoring, sleep tracking, step counting Bluetooth Features: Supports Bluetooth calls and notification synchronization Water Resistance: IP68 rating (can be submerged up to 1.5m for 30 minutes) Battery: 200mAh, magnetic charging (full charge in ~2 hours) Battery Life: Over 25 days standby time Build Material: PC/ABS plastic for durability
WiWU A821CH 8‑in‑1 Stand & Dock – A foldable aluminum laptop stand with a built-in 8‑port USB‑C dock (two USB‑A, two USB‑C, HDMI 4K30, SD/TF, Gigabit Ethernet, PD 100 W).Enhances comfort, cooling, and functionality—perfect for decluttered, professional work setups. Model: WiWU A821CH Design: Sturdy aluminum alloy stand with foldable, portable design, hollow surface for cooling, and silicone pads to prevent slips Dimensions & Weight: Compact when folded (~400 g in aluminum) Docking Hub Ports: 2 × USB-C ports 2 × USB‑A 3.0 ports 1 × HDMI (up to 4K@30 Hz) SD + micro‑SD card slots 1 × RJ‑45 Gigabit Ethernet (1000 Mbps) Docking Hub Ports: 2 × USB-C ports 2 × USB‑A 3.0 ports 1 × HDMI (up to 4K@30 Hz) SD + micro‑SD card slots 1 × RJ‑45 Gigabit Ethernet (1000 Mbps) Power Delivery: USB-C PD 3.0 supports up to 100 W—can charge a laptop while using other ports Connectivity: HDMI supports up to 4K@30 Hz; Ethernet up to Gigabit speed Stand Features: Detachable base—can use stand and hub together or separately, with adjustable ergonomic angles and vents for airflow Durability: Aluminum alloy with frosted texture, scratch-resistant finish, tested to executive standards
The Logitech C270 is an affordable, plug-and-play HD webcam delivering 720p video and clear audio—perfect for video calls, remote learning, and everyday communication on Windows, macOS, and ChromeOS. Dual stereo microphones with noise reduction for clearer voice pickup Universal compatibility: Works seamlessly with Zoom, Microsoft Teams, Google Meet, Skype, and more Plug-and-play USB-A connection: No drivers needed—just connect and start your call Adjustable clip-on mount: Fits laptops, LCD monitors, or tripods (tripod not included) Compact, lightweight design with privacy-friendly lens cover (manual)
The Moxom MX-ST16 is a 12-in-1 safety power strip with 4 AC outlets, 7 USB-A ports, and 1 USB-C PD port. It supports up to 2500W / 10A total load and provides fast USB charging (PD 20W + QC 18W), making it a practical charging hub for home, office, and desk setups. ⚡ 12-in-1 Multi-Output Design: 4 AC sockets + 7 USB-A + 1 USB-C PD allow powering and charging many devices at once. 🔋 Fast USB Charging: USB-C PD up to 20W for modern phones and tablets. QC fast-charge up to 18W on supported USB-A ports. Smart IC balances output across ports for safe, efficient charging. 🔋 Fast USB Charging: USB-C PD up to 20W for modern phones and tablets. QC fast-charge up to 18W on supported USB-A ports. Smart IC balances output across ports for safe, efficient charging. 🛡️ Multi-Safety Protection: Overload protection, surge/over-voltage protection, over-current and overheating protection, plus foreign-object detection. 👶 Child-Safety Shutters: Safety doors on AC outlets reduce accidental contact. ⏻ One-Key Master Switch: Single button controls all outlets for easy power cut-off. 📏 Long Extension Cord: About 2 meters for flexible placement. 🧊 Heat-Resistant Build: ABS + PC construction designed for durability under continuous load.
The LG UltraWide 34″ 60Hz Curved Monitor offers an expansive 21:9 aspect ratio, providing ample screen space for multitasking and immersive viewing. Its 3440 x 1440 resolution delivers sharp and detailed visuals, enhancing both productivity and entertainment experiences. Featuring a curved IPS display, this monitor ensures consistent color accuracy and wide viewing angles, making it ideal for creative professionals and gamers alike. The 60Hz refresh rate provides smooth motion, suitable for everyday tasks and casual gaming. Equipped with HDR10 support, the monitor enhances contrast and color range, bringing visuals to life with greater depth and realism. The sRGB 99% color gamut ensures vibrant and accurate colors, essential for photo and video editing. Connectivity options include USB Type-C, HDMI, and DisplayPort, allowing seamless integration with various devices. The USB Type-C port supports data transfer and power delivery, simplifying your workspace setup. The ergonomic stand offers height and tilt adjustments, enabling you to customize the monitor’s position for optimal comfort. Its sleek, virtually borderless design adds a modern touch to any workspace. In summary, the LG UltraWide 34″ 60Hz Curved Monitor combines high-resolution visuals, color accuracy, and ergonomic design, making it a versatile choice for professionals and enthusiasts. Specifications: Display : 34″ IPS Resolution : 3440 x 1440 QHD Refresh Rate : 60Hz Response Rate : 5ms GTG Curvature : 3800R
Philips 278B1 27-inch 4K UHD IPS monitor delivers sharp detail and professional-grade clarity for productivity, design, and everyday office work. It focuses on UltraClear 4K resolution, ergonomic adjustability, and eye comfort features. Additionally, it features a 27-inch IPS panel with 4K UHD resolution (3840 × 2160). This provides high pixel density and precise detail, so it improves multitasking and content accuracy. Moreover, it supports a 60Hz refresh rate with a 4ms response time. As a result, it delivers stable and smooth performance for office tasks and media use. The monitor offers a 350 cd/m² brightness level and strong contrast performance. Therefore, it improves visibility and keeps images clear in different lighting conditions. In addition, it includes wide 178° viewing angles using IPS technology. This ensures consistent color and clarity from almost any position. Furthermore, it comes with a fully adjustable ergonomic stand. It supports height, tilt, swivel, and pivot adjustments for better comfort during long working hours. It also includes eye comfort features such as Flicker-Free and LowBlue Mode. So it helps reduce eye strain during extended screen use. Philips 278B1 27-inch 4K UHD IPS monitor provides sharp visuals, flexible ergonomics, and productivity-focused performance for professional environments. Specifications: 27-inch IPS panel with 3840 × 2160 4K UHD resolution 60Hz refresh rate with 4ms response time 350 cd/m² brightness with strong contrast performance Fully adjustable stand with height, tilt, swivel, pivot Flicker-Free and LowBlue Mode for eye comfort
The MSI MPG 242R X60N 600Hz FHD Rapid TN Gaming Monitor delivers ultra‑fast performance and fluid visuals for competitive gamers. Its 24‑inch Full HD display combines high refresh rates with sharp clarity to make every frame feel smooth and responsive. Moreover, the blazing 600Hz refresh rate helps reduce motion blur so you can react faster in fast‑paced games and esports titles. This gaming monitor features a Rapid TN panel that offers extremely quick response times, minimizing ghosting and motion artifacts during intense action. Additionally, the crisp visuals and rich colors bring games and media to life, enhancing your overall experience. The sleek design and thin bezels provide a clean and immersive view that fits perfectly into any gaming setup. The MSI MPG 242R X60N includes multiple connectivity options, allowing easy connection to gaming PCs, consoles, and other devices. Furthermore, ergonomic adjustments help you find a comfortable viewing angle during long sessions. Therefore, it is ideal for esports players and competitive gamers who demand peak performance. Finally, it combines ultra‑fast refresh rates, responsive visuals, and versatile design for superior gaming experiences. Specifications: 24″ FHD gaming monitor 600Hz refresh rate for ultra‑smooth gameplay Rapid TN panel for quick response times Immersive visuals and sleek design Multiple connectivity options
WIWU Alpha Double Layer Sleeve Bag For 16\14″ Laptop/MacBook Brand: WIWU The corner patent design protects your laptop from bumps and drops in potential accident. SBS water resistance zipper Retractable waterproof TPU handle, firm and scratch resistant (commonly used in car trailer ropes) 2 compartment zipper design, organize your accessories well Water-resistant material
The MSI PRO MP251W E2 25″ FHD 120Hz Monitor delivers crisp, clear visuals for work, entertainment, and casual gaming. It uses a Full HD panel that shows sharp detail in movies, documents, and web browsing. The 25-inch size gives enough screen space without overwhelming your desk. This makes it a practical choice for home and office setups. Moreover, the MSI PRO MP251W E2 features a 120 Hz refresh rate. This smoother refresh makes motion cleaner and reduces blur during video playback and light gaming. Fast animations and scrolling look fluid. This improves comfort during long sessions. In addition, the monitor uses an IPS panel with wide 178° viewing angles. Colors remain stable even if you move side to side. The panel supports 99% sRGB coverage for natural and balanced color reproduction. This makes it useful not only for daily tasks, but also for creative work and media editing. Furthermore, the MSI PRO MP251W E2 includes adaptive sync technology to help prevent screen tearing when frame rates fluctuate. It also features anti-glare coating and built-in speakers, making it convenient for multimedia and everyday use. Also, the design is clean and modern. The thin bezels give a neat, minimal look that fits many setups. The stand allows tilt adjustment for ergonomic comfort. The monitor supports VESA mounting if you want wall mount or alternate stand setup. Overall, the MSI PRO MP251W E2 25″ FHD 120Hz Monitor balances simplicity, performance, and versatility. It delivers smooth visuals, color quality, and ease of use in a compact form factor. This monitor is a great pick for everyday computing, office tasks, media, and light gaming. Specifications: Display : 25″ IPS Resolution : FHD 1920×1080 Refresh Rate : 120Hz Response Time : 1ms
The Cudy M1200 AC1200 Mesh WiFi System provides seamless whole-home coverage with stable dual-band speeds up to 1200Mbps. Designed to eliminate dead zones, it delivers smooth roaming, strong signal performance, and reliable connectivity for homes and offices. AC1200 Dual Band WiFi – Combined speeds of up to 1200Mbps (300Mbps on 2.4GHz + 867Mbps on 5GHz) for streaming, browsing, and gaming. Whole-Home Mesh Coverage – Multiple units work together to create a single seamless network, eliminating WiFi dead zones. Seamless Roaming – Automatically connects your devices to the strongest signal as you move around your home. Gigabit Ethernet Ports – High-speed wired connections for smart TVs, gaming consoles, and PCs. Easy Setup & Management – Quick installation and control through a user-friendly interface or mobile app. Flexible Expansion – Easily add more mesh units to extend coverage anytime. Stable & Reliable Performance – Designed for multiple connected devices with consistent speed and signal strength. Gigabit Ethernet Ports (WAN/LAN) Dual Band WiFi (2.4GHz & 5GHz) Mesh Networking Technology WiFi Roaming Support Wireless Security (WPA/WPA2)
The Samsung 65″ The Frame Pro 4K Samsung Vision AI Smart TV QA65LS03FWUXTW uses a 65-inch LCD panel with 3840 × 2160 4K resolution. It is designed for standard TV viewing and wall-mounted display use in living spaces. Samsung uses Vision AI and picture processing to adjust image settings in real time. As a result, brightness, contrast, and color adjust based on the scene and content type. In addition, the system supports 4K upscaling to improve lower-resolution content clarity. The display supports HDR formats for compatible content. This improves contrast between bright and dark areas. Also, motion processing reduces blur in fast scenes such as sports and action content. The TV runs Samsung Tizen OS. Therefore, users access streaming apps, SmartThings integration, and smart features through a unified interface. It also supports Wi-Fi and Bluetooth for wireless devices. Connectivity includes HDMI ports, USB ports, Ethernet LAN, and optical audio output. It supports external devices such as gaming consoles and sound systems. This model uses The Frame design concept, which allows the display to function as both a TV and a digital art screen when not in use. Specifications: 65-inch 4K UHD LCD panel with 3840 × 2160 resolution Vision AI image processing with real-time adjustments HDR support for compatible content Tizen OS smart platform with streaming apps HDMI, USB, Wi-Fi, Bluetooth, Ethernet connectivity
The Samsung Odyssey G5 32″ 180Hz Gaming Monitor takes your gaming experience to a whole new level. Designed for gamers, it delivers stunning visuals and exceptional performance to keep you ahead of the competition. The ultra-fast 180Hz refresh rate ensures buttery-smooth gameplay. Whether you’re playing fast-paced shooters or exploring open-world adventures, the Samsung Odyssey G5 eliminates lag and motion blur for seamless action. Featuring a 1ms response time, the Samsung Odyssey G5 provides ultra-fast reactions, giving you the edge you need in competitive gaming. Every movement and input is captured instantly, making the difference between victory and defeat. The QHD resolution of the Samsung Odyssey G5 delivers stunning clarity and sharpness. With 1.7 times the pixel density of Full HD, you’ll enjoy incredibly detailed graphics and vibrant colors that make your games look their best. AMD FreeSync Premium technology ensures tear-free gaming, synchronizing the refresh rate of your monitor with your GPU for smooth performance. It reduces screen tearing and stuttering for a more fluid gameplay experience. In conclusion, the Samsung Odyssey G5 32″ 180Hz Gaming Monitor offers the perfect combination of speed, clarity, and immersion. Elevate your gaming setup with this high-performance monitor and enjoy an unbeatable experience in every game. Specifications: Display : 32″ IPS Resolution : QHD (2,560 x 1,440) Refresh Rate : 180Hz Response Time : 1ms GTG
The MSI Pro MP225 21.5″ 100Hz Business Monitor is designed for professionals who need a reliable and efficient display. It offers clear visuals, smooth performance, and a sleek design for any workspace. Firstly with a 21.5-inch Full HD display, this monitor delivers sharp images and vibrant colors. The 100Hz refresh rate ensures smoother motion, reducing screen tearing and lag. This makes it ideal for office tasks, browsing, and even light gaming. Furthermore the MSI Pro MP225 Business Monitor features anti-flicker and blue light reduction technology. This reduces eye strain, making it comfortable for long hours of work. Whether you’re working on spreadsheets, writing reports, or attending video meetings, your eyes stay protected. Designed for seamless multitasking, this business monitor supports wide viewing angles for better screen visibility. The narrow bezel design maximizes screen space, making it great for multi-monitor setups. Connectivity is simple with HDMI and VGA ports, ensuring compatibility with various devices. You can easily connect it to laptops, desktops, and other peripherals. The easy-to-use on-screen display controls let you adjust brightness, contrast, and color settings effortlessly. The MSI Pro MP225 21.5″ Business Monitor is built with energy efficiency in mind. It consumes less power while maintaining excellent performance, making it an eco-friendly choice. The tilt-adjustable stand allows you to set the perfect viewing angle for comfort. It also supports VESA mounting, so you can save desk space by attaching it to a monitor arm or wall mount. For professionals looking for a budget-friendly, high-performance monitor, the MSI Pro MP225 21.5″ 100Hz Business Monitor is a top choice. It combines clarity, comfort, and functionality to enhance productivity at work. Specifications: Display : 21.5″ IPS Resolution : 1920×1080 FHD Refresh Rate : 100Hz Response Rate : 1ms
MacBook Pro A1708 Battery A1713 for MacBook Pro 13 Inch A1708 Late 2016 Mid 2017 (EMC 2978 3164), A2171 Laptop Replacement Battery for MacBook Pro 13 Inch A2159 (2019) A2289 (2020) A2338 (2020) 【Macbook pro 13 Inch battery A1713 & A2171 Battery Specification】– Voltage: 11.4V. Capacity: 54.5Wh / 4781mAh, Battery Type: Li-ion 【Newest 4.0 upgraded OEM Battery for Apple macbook pro】– Japan High Performance Electric Core. Cobalt Proportion: >98%. Upgrade chip. Up to 1500+ recharge cycles over the life of the battery. Overcharger and Discharger Circuit Protection, Ensure fast charges and low power consumption, UL-/CE-/FCC-/RoHS-Certified for safety 【Replacement Battery A1713 for A1708 Macbook pro 13 inch】– A1708 Macbook pro 13” Late 2016: MacBook Pro 13-Inch “Core i5” 2.0 & MacBook Pro 13-Inch “Core i7” 2.4 (MacBookPro13,1, EMC2978, MLL42xx/A, MLUQ2xx/A). — A1708 Macbook pro 13” Mid 2017: MacBook Pro 13-Inch “Core i5” 2.3 & MacBook Pro 13-Inch “Core i7” 2.5 (MacBookPro14,1, EMC3164, MPXQ2xx/A, MPXR2xx/A, MPXT2xx/A, MPXU2xx/A) 【Replacement Battery A2171 for A2159 & A2289 & A2338 Macbook pro 13 inch】– A2159 Macbook pro 13” 2019: MacBook Pro 13-Inch “Core i5” 1.4 Touch & “Core i7” 1.7 Touch (MacBookPro15,4, EMC3301, MUHN2xx/A, MUHP2xx/A, MUHQ2xx/A, MUHR2xx/A, MUHR2xx/B). — A2289 Year 2020: MacBook Pro 13-Inch “Core i5” 1.4 & “Core i7” 1.7 (MacBookPro16,3, EMC 3456, MXK32xx/A, MXK52xx/A, MXK62xx/A, MXK72xx/A). — A2338 Year 2020: MacBook Pro 13-Inch “M1” 8-Core 3.2 (MacBookPro17,1, EMC3578, MYDA2LL/A*)
A31N1319 A41N1308 A41 Battery for Asus X451 X551 X451C X451CA X551C X551CA X551CA-SX024H X551CA-SX029H X551CA-DH21 X551CA-0051A2117U D550 0B110-00250100 About this item Fully compatible with your original battery, brand new from Professional Manufacturer, CE RoHS certified, grade A cells ensure fast charges and low power consumption; Built-in circuit protection ensures safety and stability. Expected operation time: 1.5-3 hours. This may vary depending on the device type and how it is used. Fits models: X451 X551 X451C X451CA X551C X551CA A41 D550 X45li9c X551CA-0051A2117U X551CA-DH21 X551CA-SX024H X551CA-SX029H Compatible Part Numbers 0B110-00250100 A41N1308 A31LJ91 A31N1319 A41N1308 X45LI9C YU12008-13007D YU12125-13002 More Part numbers of compatible batteries and Computers are listed in the Product Description
A1417 Battery Only for (Mid 2012 & Early 2013) A1398 MacBook Pro - Replacement Battery for A1398 MacBook Pro 15-inch Retina (Mid 2012, Early 2013 Version) - EMC 2512 or 2673 A1417 Battery Only for (Mid 2012 & Early 2013) A1398 MacBook Pro – Replacement Battery for A1398 MacBook Pro 15-inch Retina (Mid 2012, Early 2013 Version) – EMC 2512 or 2673 [11.26V/99Wh] A1417 A1398 Battery — Health:100%+, Voltage: 11.26V, Capacity: 99Wh(Please confirm the release year before purchase the battery) Suit for 15 inch A1398 MacBook Pro Battery Retina Mid 2012 Early 2013 (EMC 2512 or 2673) >[See more details on the Product Description] Brand new battery-> Directly warranty from Manufacturer, perform as good as the original battery. A1398 Macbook Pro 15 inch battery replacement come with adapted screwdriver. Multi-command chip control-> Contain with Durable A cells,Multi-command chip control makes the battery supply power stably.
