AOC 24B36X 23.8-inch 144Hz monitor delivers smooth and responsive performance for gaming, work, and daily use. It focuses on fast refresh rate, clear visuals, and reliable IPS panel quality. Additionally, it features a 23.8-inch IPS panel with Full HD resolution (1920 × 1080). This panel provides accurate colors and wide viewing angles, so it ensures consistent image quality from any position. Moreover, it supports a 144Hz refresh rate with 0.5ms MPRT response time. As a result, it delivers smooth motion and reduces blur during fast-paced scenes and gaming. The monitor includes Adaptive Sync technology. Therefore, it reduces screen tearing and stuttering for stable and fluid performance. In addition, it supports HDR10. This improves contrast and color depth, so visuals appear more vivid and detailed. Furthermore, it includes Flicker-Free and Low Blue Light technologies. So it reduces eye strain during long working or gaming sessions. The design also features a slim three-sided frameless layout with HDMI and DisplayPort connectivity for modern setups. AOC 24B36X 23.8-inch 144Hz monitor provides a balanced combination of speed, clarity, and comfort for both gaming and productivity. Specifications: 23.8-inch IPS panel with Full HD 1920 × 1080 resolution 144Hz refresh rate for smooth visual performance 0.5ms MPRT response time for reduced motion blur Adaptive Sync for tear-free and stable visuals HDR10 with Flicker-Free and Low Blue Light features
The ViewSonic VG1655 16″ Portable Monitor is a game-changer for those who need a secondary screen on the go. Whether you’re a digital nomad, a student, or a professional, this portable monitor enhances your productivity and entertainment experience. Firstly this 16″ portable monitor features a Full HD 1080p resolution, delivering sharp and vibrant visuals. From editing documents to watching videos, every detail is clear and crisp on the ViewSonic VG1655. Furthermore designed for portability, the ViewSonic VG1655 is lightweight and slim. It easily fits into your bag, making it an ideal travel companion. Set up is a breeze with the built-in kickstand, allowing you to adjust the screen to your preferred angle. The ViewSonic VG1655 offers versatile connectivity options. With USB-C and Mini HDMI ports, you can connect your laptop, smartphone, or gaming console. This ensures compatibility with a wide range of devices, making it a versatile addition to your tech arsenal. For those who work on the go, the ViewSonic VG1655 features a blue light filter and flicker-free technology. These features help reduce eye strain, allowing you to work comfortably for longer periods. In addition to its impressive display and portability, the ViewSonic VG1655 also boasts robust build quality. The durable design ensures that this portable monitor can withstand the rigors of travel and daily use. In conclusion, the ViewSonic VG1655 16″ Portable Monitor combines portability, high-quality visuals, and versatile connectivity for an unmatched on-the-go experience. Upgrade to the ViewSonic VG1655 today and take your productivity and entertainment to the next level. Specifications: Display : 16″ IPS Resolution : FHS 1920×1080 Refresh Rate : 60Hz Response Rate : 6.5ms Interface : USB-C
The Samsung 77″ S95D OLED 4K Smart TV | QA77S95FAUXTW is a premium large-screen television designed for exceptional picture quality and immersive home entertainment. It features advanced OLED technology, and it delivers perfect black levels, infinite contrast, and highly accurate colors. In addition, the 4K resolution ensures sharp detail and clarity across movies, games, and streaming content. This model uses Samsung’s advanced AI processor, and it enhances picture quality in real time. As a result, lower-resolution content is intelligently upscaled closer to 4K quality with improved sharpness and texture. Furthermore, the processor optimizes brightness and color balance depending on the scene, so viewing remains consistent in different lighting conditions. The Samsung S95D also supports advanced HDR performance, and it delivers brighter highlights and deeper contrast for a more cinematic experience. Therefore, visuals appear more realistic and dynamic. In addition, motion enhancement technology helps reduce blur, making fast-moving scenes in sports and action movies smoother and clearer. The Smart TV platform provides access to popular streaming applications and smart features. Meanwhile, the sleek OLED design with ultra-thin bezels creates a modern, minimalist look that blends into any living space. Overall, the Samsung 77″ S95D OLED 4K Smart TV | QA77S95FAUXTW combines premium OLED picture quality, intelligent AI processing, and advanced smart features. It is ideal for users who want a high-end cinematic viewing experience at home. Specifications: OLED panel delivers perfect blacks and infinite contrast for cinematic visuals 4K resolution ensures sharp detail and crystal-clear picture quality AI processor enhances and upscales content for improved viewing clarity HDR support delivers brighter highlights and deeper contrast levels Smart TV platform provides access to streaming apps and smart features
OEM-spec trackpad replacement (without flex cable) for MacBook Air 15.3″ M2 (Model A2941, EMC 8301) in Silver finish—engineered for precise Force Touch response, smooth multi-touch gestures, and seamless integration with the original chassis. Compatible With: MacBook Air 15.3-inch (2023, Model A2941, EMC 8301) with Apple M2 chip. Part Type: Trackpad only—does not include the flex cable, Taptic Engine, or mounting brackets. Designed for technicians who will reuse or transfer the original internal components. Finish: Silver—matches the original Silver and Starlight lower case for perfect visual continuity. Force Touch Support: Fully compatible with pressure-sensitive input and haptic feedback when used with the original Taptic Engine and logic board—no loss of functionality. Precision Build: Mirror-smooth glass surface with exact curvature, texture, and micro-click mechanism matching Apple’s OEM standards for consistent tracking and tactile feel. Installation Requirements: Requires full bottom case disassembly and careful transfer of the original flex cable and Taptic Engine. Proper adhesive application is essential to maintain structural rigidity and sensor alignment. Recommended for professional or certified repair technicians only.
The Asus VA279HG22 27″ 120Hz Eye Care Gaming Monitor offers smooth visuals and great comfort for your eyes. Its 27-inch Full HD IPS screen displays rich colors and wide viewing angles for any setup. A 120Hz refresh rate delivers fluid motion, perfect for gaming or watching fast-paced videos. The 1ms MPRT response time reduces blur for clearer, sharper images. Adaptive-Sync technology helps remove screen tearing for a seamless gaming experience. You’ll enjoy smoother gameplay with less stuttering or lag. The monitor includes Flicker-Free and Low Blue Light features to reduce eye strain. Even after hours of use, your eyes stay more comfortable. An anti-glare screen improves visibility in bright or sunny environments. It’s ideal for work or play in any room. HDMI and VGA ports offer easy connection to your devices. You also get a headphone jack for private listening. The monitor has a slim, modern, and frameless design for a clean look. It fits into any gaming, work, or study space easily. Tilt adjustment allows you to set the perfect viewing angle. It’s also VESA mount compatible for flexible installation. You can customize settings using ASUS DisplayWidget Center software. Adjust brightness, color, and more with just a few clicks. GamePlus features like crosshair overlays and timers give an edge in competitive gaming. These tools help improve focus and reaction time. The Asus VA279HG22 27″ 120Hz Eye Care Gaming Monitor combines performance and comfort in one stylish display. It’s a great choice for gamers, students, and professionals. Specifications: Display : 27″ IPS Resolution : 1920×1080 Refresh Rate : 120Hz Response Rate : 1ms
Used OEM Original Apple Logic Board Working, A1706 Late 2017 Mode 3.3 GHz i7 256gb 16gb RAM Tested using latest industry hardware diagnostic software, Fresh pull from full unit.
The Samsung 27″ 120Hz Essential S3 Monitor LS27F320GAMXUE delivers clear and smooth visuals with a Full HD (1920 × 1080) resolution and 120 Hz refresh rate, which helps reduce motion blur and lag during fast‑moving scenes. Additionally, the IPS panel provides wide viewing angles and consistent color across the screen, making it suitable for work, entertainment, and casual gaming. The monitor includes Game Picture Mode to optimize contrast and color settings for different game genres. Moreover, Samsung equips this monitor with Eye Saver Mode and Flicker Free technology to help reduce eye strain during extended use. Therefore, users can stay comfortable during long work or play sessions. The design features a modern, slim bezel look that enhances any desk setup. Connectivity includes two HDMI 1.4 ports for flexible device connection. Specifications: Display : 27″ Resolution : 1920 x 1080 FHD Refresh Rate : 120Hz Response Rate : 5ms
WIWU GENIUS COMBO SET BAG WITH MOUSE AND MOUSE PAD FOR 14" LAPTOP/ULTRABOOK - BLACK WIWU GENIUS COMBO SET BAG WITH MOUSE AND MOUSE PAD FOR 14″ LAPTOP/ULTRABOOK – BLACK Details: Material: plaid polyester + metal Mouse: single mode 2.4G Product weight: 14 inch / 465g Product size: 14 inches: 35*25*2cm Handbag+mouse+mouse pad Front layer multi-pocket design Better help classify items Waterproof fabric
*Additional 8$ Delivery Fee Outside Beirut Due to The Packaging Size Step into a new level of gaming comfort with the Noblechairs ICON Gaming Chair. This exceptional chair is designed to provide gamers with unparalleled support during extended gaming sessions. To begin with, the ergonomic design of the ICON Gaming Chair ensures optimal posture, reducing the risk of discomfort and fatigue. Its adjustable features cater to individual preferences, allowing you to customize the chair to suit your unique gaming setup. Transition seamlessly between work and play by utilizing the ICON chair’s versatile features. Whether you’re immersed in a gaming marathon or tackling tasks at your desk, the chair’s adaptability enhances both focus and relaxation. Crafted with premium materials, the Noblechairs ICON exudes durability and style. The luxurious padding and high-quality leather or fabric upholstery provide a plush and inviting seat, elevating the overall gaming experience. The ICON Gaming Chair’s 4D armrests and robust reclining mechanism add a layer of functionality, allowing you to find the perfect position for gaming or taking a well-deserved break. Enjoy maximum flexibility without compromising on stability. Investing in the Noblechairs ICON is not just a choice for gaming; it’s a commitment to your well-being. The chair’s lumbar and neck support cushions promote a healthy sitting posture, enhancing your overall comfort during extended sessions. In summary, the Noblechairs ICON Gaming Chair combines style, comfort, and functionality, making it an ideal choice for gamers seeking a premium seating solution. Elevate your gaming experience to new heights with this exceptional gaming chair. Specifications: Material : High Quality Leather Frame : Steel Armrests : 4D With Maximum Adjustability Backrest : Adjustable Angle 90° to 135° Max Load : Up to 150 kg
The Mars Gaming MGC-ERGOPLUS Ergonomic Chair offers strong comfort for long hours of sitting. It supports your back with an ergonomic design. Also, it keeps your posture steady during work or gaming. Because of this support, you feel better throughout the day. The Mars Gaming MGC-ERGOPLUS Ergonomic Chair uses high-quality materials for daily use. The frame stays firm under pressure. In addition, the breathable fabric keeps you cool while you focus. The seat cushion feels soft yet supportive. Therefore, you can sit for long periods without discomfort. This chair includes easy adjustments. For example, you can lift or lower the seat smoothly. You can also tilt the backrest for more comfort. Moreover, the armrests adjust to match your desk height. As a result, you maintain a natural sitting position. This helps reduce stress on your neck and shoulders. The Mars Gaming MGC-ERGOPLUS Ergonomic Chair fits both gaming rooms and offices. Its clean style looks modern and neat. Even more, the strong wheels move softly on different floors. This makes the chair very practical for daily activity. Many people choose this chair for long sessions. The comfort stays consistent even after many hours. Besides that, the ergonomic build helps improve focus and energy. So the chair becomes a useful partner in your tasks. In conclusion, the Mars Gaming MGC-ERGOPLUS Ergonomic Chair offers comfort, strength, and great value. It improves posture and reduces strain. It also adapts easily to your needs. With all these benefits, it becomes a smart choice for gamers and workers. Specifications: Adaptive dynamic lumbar support Mulch Adjustable height between 115-125 cm Folding armrests and adjustable headrest
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
The Deadskull PlaySeat Racing Simulator offers immersive, authentic racing seat quality for gaming enthusiasts. It is engineered with input from professional racing drivers for realistic driving posture. Moreover, it uses premium Alcantara upholstery, like actual racing car seats, for comfort and durability. Also, it supports all major platforms: PlayStation, Xbox, Nintendo Switch, PC, and Mac systems. In addition, the steel frame is fully adjustable to suit different heights and preferences. Besides that, Deadskull offers a patented foldable design that saves space when not in use. Furthermore, it is quick and easy to assemble with included tools and instructions. It accommodates drivers from 120 to 220 cm tall and weights between 20 to 122 kg. Also, seat dimensions are 130 × 50 × 98 cm, and it weighs around 19.8 kg. While wheel and pedals are sold separately, the rig supports popular brands like Logitech and Thrustmaster. Then, you can fold it away easily after a session and free up room. Also, it suits both kids and adults for shared use in a household. Furthermore, its black frame offers a sleek and professional aesthetic. Consequently, it enhances realism and immersion in sim racing setups. As a result, the Deadskull PlaySeat is an ideal entry-level rig for serious sim racers. In conclusion, it balances comfort, flexibility, and realism for its price category. Finally, it makes a solid stepping‑stone for gamers entering the world of sim racing.
Samsung 24″ Essential Monitor Aspect Ratio16:9 Brightness (Typical)250 Contrast Ratio Static1000:1(Typical) Resolution1,920 x 1,080 Response Time5 (GTG） Viewing Angle (H/V)178°/178° Specifications Detail Display Screen Size (Class)24 Flat / CurvedFlat Active Display Size (HxV) (mm)527.04 x 296.46 Aspect Ratio16:9 Panel TypeIPS Brightness (Typical)250 Brightness (Min)200 Contrast Ratio Static1000:1(Typical) Resolution1,920 x 1,080 Response Time5 (GTG） Viewing Angle (H/V)178°/178° Color SupportedMax 16.7M Color Gamut (NTSC 1976)72% (CIE 1931) Refresh RateMax 75Hz General Feature Eco Saving PlusYes Eye Saver ModeYes Flicker FreeYes Game ModeYes Image SizeYes Windows CertificationWindows 10 FreeSyncYes Interface D-Sub1 Display Port Out Version HDMI1 HDMI Version1.4 HDCP Version (HDMI)1.2 USB Hub VersionNo USB-C Charging PowerNo Operation Conditions Temperature10~40 ℃ Humidity10~80, Non-condensing Design Front ColorBLACK Rear ColorBLACK Stand ColorBlack Stand TypeSIMPLE Tilt-2.0°(-1.0°/+2.0°)~20.0°(±2.0°) Wall Mount (mm)100.0 x 100.0 Eco Energy Efficiency ClassB Recycled Plastic20.6 % Power Power SupplyAC 100~240V Power Consumption (Max)25W Power Consumption (Typ)20.0 W Power Consumption (DPMS, W)0.50 Power Consumption (Off Mode, W)0.30 Power Consumption (Yearly)29 kWh/year TypeExternal Adaptor Dimension Set Dimension with Stand (WxHxD, mm)539.5 x 422.8 x 217.4 Set Dimension without Stand (WxHxD, mm)539.5 x 322.8 x 41.2 Package Dimension (WxHxD, mm)607.0 x 147.0 x 380.0 Specifications: Specifications : Aspect Ratio16:9 Brightness (Typical)250 Contrast Ratio Static1000:1(Typical) Resolution1,920 x 1,080 3 Year Warranty
• LCD panel type: IPS technology • Backlight type: W-LED system • Panel Size: 23.8 inch / 60.5 cm • Display Screen Coating: Anti-Glare, 3H, Haze 25% • Effective viewing area: 527 (H) x 296.5 (V) • Aspect ratio: 16:9 • Maximum resolution: 1920 x 1080 @ 75 Hz* • Pixel Density: 93 PPI • Response time (typical): 4 ms (GtG)* • Brightness: 250 cd/m² • Contrast ratio (typical): 3000:1 • SmartContrast: Mega Infinity DCR • Pixel pitch: 0.2745 x 0.2745 mm • Viewing angle: 178º (H) / 178º (V), @ C/R > 10 • Flicker-free • Display colors: 16.7 M • Scanning Frequency: 30 – 85 kHz (H) / 48 – 75 Hz (V) • LowBlue Mode • EasyRead • sRGB • Adaptive sync , CABLE POWER,CABLE HDMI,CABLE VGA 1 YEAR WARRANTY
The Samsung 98″ Crystal UHD DU9000 4K Tizen OS Smart TV UA98DU9000UXTW uses a 98-inch LCD panel with 3840 × 2160 4K resolution. It is built for large rooms where screen size matters more than advanced display processing. Samsung uses the Crystal Processor 4K to handle image processing and upscaling. It converts lower-resolution video into higher clarity output for the 4K panel. It also supports HDR10 and HDR10+, which improve contrast between bright and dark areas for compatible content. The TV runs at a native 60 Hz refresh rate. It includes Motion Xcelerator to reduce blur in fast scenes. This helps improve clarity in sports and basic gaming. Samsung Tizen OS powers the smart system. It gives access to streaming apps, internet browsing, and SmartThings integration. The interface responds quickly and supports easy navigation. The TV includes Wi-Fi and Bluetooth for wireless connections. It also provides multiple HDMI ports with eARC support, USB ports, Ethernet input, and optical audio output. It supports Auto Low Latency Mode for gaming consoles. Overall, this model focuses on large-screen 4K viewing, standard HDR support, and basic smart TV functionality without advanced local dimming or high-end gaming features. Specifications: 98-inch LCD panel with 3840 × 2160 (4K UHD) resolution Samsung Crystal Processor 4K with 4K upscaling HDR10 and HDR10+ support Tizen OS smart platform with streaming apps HDMI, USB, Ethernet, Wi-Fi, and Bluetooth connectivity
*Additional 8$ Delivery Fee Outside Beirut Due to The Packaging Size The Cougar Armor EVO S Gaming Chair is designed for serious gamers who want maximum comfort and durability. This chair is built to withstand hours of gaming, giving you the support you need for every session. With its ergonomic design, it fits your body perfectly, reducing strain and helping you stay focused. The Cougar Armor EVO S comes with high-quality materials and premium padding. It’s upholstered with breathable PVC leather, allowing airflow and keeping you cool during intense gaming. The high-density foam padding provides extra comfort, so you can game longer without discomfort. This gaming chair is fully adjustable to meet your personal preferences. You can adjust the height, recline up to 180 degrees, and lock it in place for ultimate relaxation. The 4D adjustable armrests move in four directions—up, down, left, and right—giving your arms the support they need during gaming. Another highlight of the Cougar Armor EVO S Gaming Chair is its solid steel frame. This ensures stability and long-lasting durability, holding up to 264 pounds of weight. The chair also features a Class 4 gas lift for smooth and safe height adjustment. Built with a stylish design, the Cougar Armor EVO Gaming Chair looks great in any gaming setup. It comes with extra accessories, such as a headrest and lumbar pillow, providing additional support to avoid back and neck strain. Elevate your gaming experience with the Cougar Armor EVO S Gaming Chair and enjoy the ultimate combination of style, comfort, and durability. Specifications: Magnetic memory foam neck pillow. Breathable PVC leather. Full steel frame for sturdy support. 3D adjustable armrest. Retractable Footrest. Lumbar Cushion.
Upgrade your entertainment setup with the ViewSonic VX2458-P-MHD monitor, designed to take your viewing experience to new heights. Featuring a 24” display, this monitor offers crystal-clear visuals that immerse you in every scene. With a blazing-fast 144Hz refresh rate, this monitor ensures smooth, fluid motion in all your favorite content. Say goodbye to motion blur and hello to a seamless viewing experience that keeps up with the action. Transitioning to responsiveness, the VX2458-P-MHD boasts an impressive 1ms response time, minimizing input lag for ultra-responsive gaming and multimedia performance. Enjoy instantaneous reactions to your commands, whether you’re gaming or watching movies. Furthermore, the monitor’s Full HD resolution delivers crisp, detailed images that bring your entertainment to life. From vibrant colors to sharp contrasts, every scene pops with stunning clarity and realism. Moreover, with AMD FreeSync technology, screen tearing and stuttering are virtually eliminated, ensuring silky-smooth gameplay and seamless video playback. Immerse yourself in your favorite games and movies without distractions. In addition, the monitor’s versatile connectivity options, including HDMI and DisplayPort, make it easy to connect to a variety of devices, from gaming consoles to PCs and laptops. In conclusion, the ViewSonic VX2458-P-MHD monitor is the ultimate choice for immersive entertainment experiences. With its high refresh rate, swift response time, and vibrant visuals, it’s the perfect companion for gaming, movies, and more. Upgrade your viewing experience today and enter a world of endless entertainment possibilities. Specifications: Display : 24″ TN Resolution : FHD (1920×1080) Refresh Rate : 144Hz Response Rate : 1ms GTG
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
The Samsung 55″ Neo QLED QN85F 4K Vision AI Smart TV QA55QN85FAUXTW delivers a premium viewing experience with advanced Neo QLED display technology and intelligent AI processing. It produces bright, sharp, and detailed images with strong contrast, so movies, sports, and games look clear and immersive on the 55-inch screen. Neo QLED technology uses Quantum Mini LEDs to improve brightness control and contrast accuracy. As a result, dark scenes appear deeper while bright scenes stay vivid and balanced. This creates a more realistic picture across different types of content. Vision AI enhances picture and sound in real time. It analyzes each scene and automatically adjusts brightness, sharpness, and color for better output. Therefore, the TV consistently delivers optimized visuals without manual settings. In addition, AI upscaling improves lower-resolution content closer to 4K quality. HDR support expands brightness range and color depth, making visuals more dynamic and lifelike. Fast motion handling also improves clarity, which enhances sports and action viewing. The Smart TV platform provides easy access to streaming apps, gaming features, and smart home controls. It runs smoothly and responds quickly between apps. In addition, the slim design with thin bezels gives the TV a modern and premium look. Overall, this Samsung Neo QLED TV combines strong brightness performance, AI optimization, and smart connectivity for a powerful entertainment experience. Specifications: Neo QLED technology delivers bright and detailed picture quality 55-inch 4K display provides immersive viewing experience Vision AI enhances picture and sound automatically HDR improves contrast, brightness, and color depth Smart TV platform supports apps, streaming, and smart features
lenovo battery L16L2PB2 L16M2PB1 L16S2PB2 L16C2PB2 Laptop Notebook Battery for Lenovo 5000-15 2ICP6/55/90 Series 7.4V 30Wh 4050mAh About this item Condition: New Voltage: 7.4V Capacity: 30Wh/4050mAh Replace Part Number: L16M2PB1 L16L2PB2 L16M2PB2 L16S2PB1 L16L2PB3 L16C2PB1 L17L2PF1 L17M2PB7 L16C2PB2 L16L2PB1 L16M2PB3 2ICP6/55/90 Fit For: Lenovo 5000-15 Series Raise the battery life: 1: After receiving the battery, Please charge it fully, discharge it to around 10, and do it three times. 2: If you don’t use the battery for a long time, please charge and discharge it once a month
