The LG 34″ 160Hz 5ms Curved UltraGear Monitor takes your gaming to the next level. With its expansive 34-inch curved display, you’ll be immersed in your games like never before. The curve wraps around your field of vision, creating a more engaging and realistic experience. So enjoy ultra-smooth gameplay with the 160Hz refresh rate of the LG UltraGear Monitor. It reduces motion blur and delivers crisp visuals, ensuring you never miss a detail. Coupled with a 5ms response time, this monitor provides fast and accurate performance, making it perfect for fast-paced games. The LG 34″ UltraGear Monitor also boasts a high resolution, bringing your games to life with stunning clarity and detail. Every frame is rendered with precision, enhancing your overall gaming experience. Also connectivity is seamless with multiple input options, including HDMI and DisplayPort. Easily connect your gaming console, PC, or other devices for a versatile gaming setup. Plus, the monitor’s sleek and modern design adds a touch of elegance to your gaming station. Moreover comfort is key during long gaming sessions. The LG UltraGear Monitor features an adjustable stand, allowing you to find the perfect viewing angle. Reduce eye strain with the flicker-free and blue light reduction features, ensuring you can game comfortably for hours. In conclusion, the LG 34″ 160Hz 5ms Curved UltraGear Monitor is designed to deliver an immersive and smooth gaming experience. Upgrade your setup with this powerful and stylish monitor, and enjoy a new level of gaming excellence. Specifications: Display : 34″ Curved QHD Resolution : 3440×1440 Refresh Rate : 160Hz Response Rate : 5ms Built-in Speaker : 2x 7W Adjustable Tilt, Height
Are you in search of a gaming monitor that takes your gaming experience to the next level? Look no further than the Samsung 32″ 165Hz Gaming Monitor. This monitor is packed with features that deliver smooth gameplay and stunning visuals, making it the perfect choice for gamers. Transitioning to its core, the Samsung Gaming Monitor boasts a high refresh rate of 165Hz, ensuring fluid motion and reduced screen tearing for an ultra-smooth gaming experience. Whether you’re playing fast-paced action games or immersing yourself in the latest AAA titles, this monitor keeps up with the action without missing a beat. Its 32-inch display provides ample screen real estate for immersive gaming sessions. With vibrant colors and crisp details, every game comes to life on this monitor, pulling you into the heart of the action. Furthermore, the Samsung 32″ 165Hz Gaming Monitor features a sleek and modern design that complements any gaming setup. With slim bezels and a minimalist aesthetic, this monitor not only enhances your gaming experience but also adds a touch of style to your gaming rig. Connectivity is key, and this monitor offers a range of ports including HDMI and DisplayPort, allowing you to connect to your gaming PC, console, and other devices with ease. Whether you’re gaming solo or with friends, stay connected and ready to play at a moment’s notice. In summary, the Samsung 32″ 165Hz Gaming Monitor is the ultimate choice for gamers seeking high performance and immersive visuals. Upgrade your gaming setup today and experience gaming like never before with this top-of-the-line monitor. Specifications: Display : 32″ IPS Resolution : 2,560 x 1,440 Refresh Rate : 165Hz Response Rate : 1ms (GTG)
A dependable pre-owned Dell Latitude 5470 with 14" display, 6th Gen Core i5, 8GB RAM, and 256GB SSD—offering solid business performance, security, and durability at an affordable price.
HP P24q G4 QHD Height Adjust Monitor Are you seeking a monitor that can elevate your workstation’s comfort and productivity? Meet the HP P24q G4 QHD Height Adjust Monitor, a versatile solution designed to meet your needs. One of the key features of the HP P24q G4 is its Quad High Definition (QHD) display. With four times the resolution of standard HD, you’ll experience stunning clarity and detail in your work and entertainment. The 24-inch screen size strikes a perfect balance, providing enough space for multitasking without taking up excessive desk space. It’s a comfortable and functional addition to any workspace. Adjusting the monitor to your preferred height is effortless, thanks to its height-adjustable stand. This allows you to tailor your viewing angle for maximum comfort, reducing strain during extended work hours. Setting up the P24q G4 is a straightforward process. Connect it to your PC or laptop through standard ports, and you’re ready to enhance your workspace. Say goodbye to complicated installation procedures. The monitor’s modern design not only complements your workspace but also adds a touch of sophistication. It blends seamlessly with your existing setup, enhancing the overall aesthetics. Whether you’re a professional or a casual user, the HP P24q G4 offers fantastic value for your investment. Its affordable price point ensures that you can enjoy top-notch features without breaking the bank. Specifications: 60.45 cm (23.8″) QHD (2560 x 1440) Asset control; Language selection; On-screen controls; Pivot rotation; Plug and Play; User controls; Anti-glare Response time: 5ms GtG (with overdrive) HDMI; VGA
The Samsung 65-Inch OLED Smart TV | QA65S90FAEXTW is a premium entertainment display designed to deliver exceptional picture quality and advanced smart features. Featuring OLED technology, this television produces deep blacks, vibrant colors, and impressive contrast for a truly immersive viewing experience. In addition, the 65-inch screen size provides an ideal balance between cinematic entertainment and everyday home use. The OLED panel uses self-illuminating pixels, and it allows precise control over brightness and contrast in every scene. As a result, movies, sports, and games appear more realistic and detailed. Furthermore, the 4K UHD resolution delivers sharp image quality, ensuring that content looks crisp and lifelike. Samsung enhances the viewing experience with intelligent AI-powered picture processing. Therefore, the TV automatically optimizes image quality, color accuracy, and motion performance based on the content being displayed. In addition, AI upscaling improves lower-resolution content, bringing it closer to 4K clarity. HDR support expands brightness and contrast levels, so viewers can enjoy more realistic highlights and deeper shadows. Meanwhile, Samsung’s Smart TV platform provides convenient access to streaming services, gaming features, and smart home integration from a single interface. The slim and modern design complements any living room setup while maximizing screen space. Overall, the Samsung 65-Inch OLED Smart TV | QA65S90FAEXTW combines premium OLED technology, intelligent processing, and smart connectivity to deliver a high-quality home entertainment experience. Specifications: OLED technology delivers deep blacks and exceptional contrast performance 65-inch 4K UHD display provides sharp and detailed visuals AI-powered processing enhances picture quality and content clarity HDR support improves brightness, contrast, and color accuracy Smart TV platform offers streaming apps and connected home features
Are you in the market for a reliable monitor that won’t break the bank? Look no further than the ViewSonic VX2719-PC-MHD. In this comprehensive guide, we’ll delve into the key features and advantages of this budget-friendly monitor. The ViewSonic VX2719-PC-MHD offers a stunning 27-inch display, making it perfect for work or play. Its size allows you to enjoy a more immersive visual experience, whether you’re working on a project or streaming your favorite movies. One of the key benefits of this monitor is its Full HD resolution, which ensures that your content appears sharp and clear. Whether you’re editing photos, watching videos, or browsing the web, you’ll appreciate the vivid visuals this monitor delivers. Furthermore, the ViewSonic VX2719-PC-MHD boasts a rapid response time, reducing motion blur during fast-paced games or action-packed movie scenes. This makes it an ideal choice for both gamers and casual users. Connectivity is a breeze with this monitor, thanks to its HDMI and VGA inputs. You can effortlessly connect it to your computer, gaming console, or other devices without any hassle. In terms of setup, the ViewSonic VX2719-PC-MHD is designed with user-friendliness in mind. It comes with an easy-to-follow manual, and the on-screen menu is straightforward, allowing you to customize your display settings without any confusion. 3 years warranty MANUFACTURERS LINK YOU CAN ALSO CHECK HERE Specifications: 240Hz refresh rate for smooth gameplay 1ms (MPRT) response time for precision 1500R Curved screen for immersive visuals AMD FreeSync Premium prevents screen tearing Full HD resolution for rich detail VX2719-PC-MHD
MSI Modern MD271UL 27″ 4K Business Monitor is a 27-inch IPS display for office work and creative tasks. It shows 4K UHD resolution (3840 × 2160) for sharp text and clear images. Additionally, it fits well in modern minimal setups. Moreover, MSI designed this monitor for color accuracy and productivity. It supports wide color gamut for design and editing work. Therefore, it suits professionals who need reliable visual quality instead of gaming speed. In addition, MSI Modern MD271UL 27″ 4K Business Monitor includes USB-C connectivity with power delivery. This allows a single cable connection for compatible laptops. It also includes HDMI and DisplayPort for flexible use. Furthermore, it adds eye-care features to reduce strain during long sessions. The monitor runs at 60Hz for stable and consistent performance. It works well in offices, studios, and home workspaces. As a result, it supports multitasking and daily productivity with ease. MSI Modern MD271UL 27″ 4K Business Monitor delivers sharp 4K visuals, strong color accuracy, and simple USB-C connectivity for professional use. Specifications: 27-inch 4K UHD IPS display (3840×2160) USB-C with power delivery support Wide color gamut for accurate visuals HDMI and DisplayPort connectivity Eye-care technology for long use comfort
The BenQ GL2780 27″ 75Hz Monitor is a practical and affordable choice for everyday use and light gaming. It features a 27-inch Full HD screen that delivers sharp visuals and clear details for work or play. The monitor offers a 75Hz refresh rate and a fast 1ms response time for smooth motion and reduced blur. Its LED backlight provides good brightness, while the anti-glare screen helps reduce reflections in bright rooms. With BenQ Eye-Care technology, including Flicker-Free and Low Blue Light modes, your eyes stay comfortable longer. The Brightness Intelligence feature adjusts the screen brightness based on room lighting for better viewing. You can connect the monitor easily using HDMI, DisplayPort, VGA, or DVI-D inputs, giving flexibility with devices. It also includes built-in 2W speakers and a headphone jack for simple audio without needing extras. The stand allows tilt adjustment, so you can set the best viewing angle for your desk setup. It’s also VESA mount compatible, giving you the option to mount it on a wall or arm. The design is sleek and clean, fitting nicely in any home office, school, or entertainment space. With solid performance and user-friendly features, it’s a great option for students, professionals, and casual gamers. The BenQ GL2780 27″ 75Hz Monitor offers reliable performance, smooth visuals, and great eye comfort at a budget-friendly price. Specifications: Display : 27″ Resolution : FHD 1920 x 1080 Refresh Rate : 75Hz Response Time : 1ms Speaker : Integrated
BATTERY DELL WDX0R for Dell Inspiron 13 15 5000 7000 Series 5570 7579 7378 5567 7573 5565 5379 5378 Latitude 3490 3590 3340 3400 3390 3500 3190 Vostro 5468 5568 P69G 3CRH3 11.4V 42Wh About this item 【Specification】Dell laptop Replacement Battery Type: Li-ion; Voltage: 11.4V; Capacity: 42WH; Cells:3-Cell. (It is not the same as the 4-cell 33YDH 56Wh battery ) !!! Please make sure to choose the battery according to the shape of the original one, as the batteries for different laptop models may vary 【Stability】WDXOR WDX0R Laptop Battery Replacement battery for Dell offers 600+ recharge cycles over life of battery 【COMPATIBLE MODEL】(Check description below for more models) Dell Laptop Battery WDX0R P69G001 3CRH3 FC92N T2JX4 C4HCW Y3F7Y Dell Battery 3-cell 42WH 11.4v Li-on WDX0R Dell Battery Dell Inspiron 15 5570 Battery Inspiron 13-7378 battery Inspiron 15-7579 battery Dell Inspiron 5379 Battery Dell Inspiron 5567 Battery Dell Inspiron 13 7000 Battery Dell Inspiron p69g Battery Dell Inspiron 7573 Battery Dell Latitude 3340 3590 Battery Dell Vostro 5568 5468 Series Battery
The Dell Latitude 5410 is a dependable, enterprise-grade 14-inch business laptop built for smooth multitasking and daily office productivity. Powered by a 10th Generation Intel Core i5 processor and fast SSD storage, this pre-owned Grade-B unit offers excellent performance value with minor, visible cosmetic wear on the outer chassis.
BenQ RE8604 86” 4K UHD Interactive Flat Panel is a large interactive display designed for classrooms, meeting rooms, and training environments. It supports touch interaction, built-in Android system, and 4K resolution for collaboration and presentations. It features an 86-inch IPS panel with 3840 × 2160 4K UHD resolution. Therefore, it delivers sharp visuals and wide viewing angles for group use. In addition, it supports up to 40-point multi-touch input for writing and collaboration. Moreover, it runs an Android-based system (EDLA-supported depending on configuration). As a result, users can open apps, use whiteboard tools, and present content directly on the display without an external PC. The display includes anti-glare glass. Therefore, it remains readable in bright environments. In addition, it supports 4K 60Hz output for smooth visuals during presentations and video playback. Furthermore, it includes HDMI, USB, USB-C, LAN, and OPS slot connectivity. As a result, it works with laptops, external PCs, and modular computing systems. It also includes built-in speakers for classroom and meeting audio. Therefore, it supports presentations without extra sound systems. Finally, the BenQ RE8604 delivers a large 4K interactive workspace with multi-touch control and flexible connectivity for education and business use. Specifications: Display: 86-inch IPS panel with 3840×2160 4K UHD resolution Touch: Up to 40-point multi-touch support for collaboration System: Android-based interactive platform (EDLA support depending on model) Connectivity: HDMI, USB, USB-C, LAN, and OPS slot Display: Anti-glare screen with 4K 60Hz smooth output
Lenovo ThinkVision T32h-20 61F1GAT2EU The Lenovo ThinkVision T32h-20 .Do more than just optimize your productivity . with the ThinkVision T32h-20 monitor. An enhanced view of and easy navigation. through documents, spreadsheets, or designs on this sleek display that complements your modern workspace. Its vast 31.5-inch screen with QHD resolution delivers more screen real estate with higher clarity than FHD, making data-intensive work, number crunching, and content editing a breeze. The one-cable solution USB Type-C, HDMI, and DP ports provide multiple interface options. Integrated with Smart Power, the USB Type-C also doubles up. as a charger for dynamic consumption and intelligent power management. Top Features 31.5″QHD (2560 x 1440) 3-side Near-edgeless display USB Type-C one cable solution HDMI, DP ports with USB hub Ergonomic and space-saving design & UE Specifications Brightness 350 cd/m2 Contrast ratio 1000:1 Connection type 1 x USB Type-C Gen1 (DP1.2 Alt Mode)4 x USB 3.1 Gen1 ports (Downstream, incl. 1 x BC) Panel type In-Plane Switching Display stand Lift, Tilt, Pivot, Swivel EU energy class E Power requirement AC 100 to 240 V (50-60 Hz) Brand ThinkVision Anti-reflex Yes Color calibration accuracy Yes Color coverage 99% sRGB Color depth 10-bit Color support 1.07 Billion Measure without packaging 235.0 x 469.4 x 714.6 mm, 9.25 x 18.48 x 28.13 inches Gentle on the eyes Yes Screen dimensions (without foot) 714.6 x 426.0 x 51.0 mm, 28.13 x 16.77 x 2.01 inches Height adjustable Yes Kensington lock Yes Almost borderless Yes Sound bar support (optional) Yes Power consumption 28 W Typ. 138 W Max. TCO Edge 2.0 Display weight (without foot) 6.78 kg, 14.95 lbs. Weight with packaging 12.96 kg, 28.57 lbs. Weight without packaging 9.85 kg, 21.72 lbs. Description The Lenovo ThinkVision T32h-20’s large display can be used to open and work on several documents at once Its near bezel-less design fits into any modern workplace. Integrated USB Type-C dock with charging function up to 75 W (1 x USB 3.1 Type-C upstream. 4 x USB 3.1 Type-A downstream) – Smart Power for energy – TÜV Rheinland Eye Comfort Specifications: Specifications Product name Lenovo ThinkVision T32h-20 Monitor Product type Desktop monitor Display Display size 81.3 cm (32.0″) Physical resolution 2.560 x 1.440 WQHD Aspect ratio 16:9 Contrast 1000:1 Brightness 350 cd/m² Panel technology IPS Viewing angle (horizontal / vertical) 178° / 178° Response time 6 ms Display surface Matt Backlight White LED 1 year warranty
A powerful pre-owned Dell Precision 7550 mobile workstation with 15.6" display, 10th Gen Core i7, 16GB RAM, 256GB SSD, and NVIDIA Quadro T2000 4GB—built for engineers, designers, and professionals who need certified performance and reliability.
Cooler Master MasterGel Regular Thermal Paste PRODUCT NUMBERMGX-ZOSG-N15M-R2COLORGrayTHERMAL CONDUCTIVITY5 (W/m-K) SPECIFIC GRAVITY2.5 (g/cm3) (25°C) VOLUME1.5m lGREASE CLEANERYes EAN CODE 4719512077757UPC CODE884102050244SERIES Thermal Grease, MasterGel Series COOLER TYPEThermal Grease
WiWU Pioneer Pro Handbag – Stylish, waterproof laptop bag with soft-lined padded interior and reinforced corners.Ideal for 14″ and 15.6″ laptops, offering excellent protection, comfort, and everyday utility. Model: WiWU Pioneer Pro Sizes: Designed for both 14″ and 15.6″ laptops Material: Durable, water-resistant polyester exterior Interior: Faux-fur lining with thick anti-shock padding Protection: 360° corner reinforcement for enhanced drop resistance Compartments: Main padded laptop section Zippered front organizer for cables, mouse, notebook, and accessories Compartments: Main padded laptop section Zippered front organizer for cables, mouse, notebook, and accessories Carry Options: Top retractable waterproof TPU handle Adjustable and removable shoulder strap Luggage trolley strap on the back Carry Options: Top retractable waterproof TPU handle Adjustable and removable shoulder strap Luggage trolley strap on the back Zippers: High-quality YKK zippers for smooth operation Design: Slim profile, minimalist look, available in Black and Gray Suitable for: Business, school, travel, and daily professional use
Arabic Language Silicone Keyboard Cover Skin for MacBook Air 13" Macbook Pro with / without Retina Display 13"15" 17" MC184LL/B, NOT COMPATIBLE WITH NEW MacBook Air 13” A1932 (Black) Arabic Language Silicone Keyboard Cover Skin for MacBook Air 13″ Macbook Pro with / without Retina Display 13″15″ 17″ MC184LL/B, NOT COMPATIBLE WITH NEW MacBook Air 13” A1932 (Black) About this item Only compatible with MacBook Air 13″ (Model: A1369 & A1466) , MacBook Pro 13-Inch with DVD Drive (Model: A1278), Pro 13 inch with Retina Display (Model: A1425 & A1502), Pro 15 inch with DVD Drive (Model: A1286), Pro 15 inch with Retina Display (Model: A1398), Pro 17 inch (Model: A1297) and Apple Wireless Bluetooth Keyboard MC184LL/B (A1314). NOT COMPATIBLE WITH NEWEST MacBook Air 13″ 2018 (Model: A1932) Fit for American Version( “Enter” key is a rectangle), DO NOT FIT FOR Europe Version (“Enter” key looks like “7”) Extra slim silicone skin, made it easier for typing. Soft silicone can ELIMINATE THE SOUND when typing FLEXIBLE, WASHABLE, easy to apply and remove for cleaning or disinfecting. Manufactured to the highest quality available, Ultra thin design lets you open and close your computer without any affection
Firstly the Alienware 25″ 360Hz Gaming Monitor AW2523HF is built for gamers who demand fast and smooth performance. It features a 24.5-inch Fast IPS panel with Full HD resolution for sharp visuals and vivid colors. Furthermore this gaming monitor offers a blazing 360Hz refresh rate via DisplayPort and up to 255Hz via HDMI, making motion incredibly smooth. With a 0.5ms response time, fast-paced games feel crisp and responsive with minimal blur. The display supports 99% sRGB color gamut, ensuring rich and accurate colors. It also has an anti-glare coating and 178° wide viewing angles, so your game looks great from every position. It’s compatible with AMD FreeSync Premium and G-SYNC, giving you a tear-free and fluid gameplay experience on both major GPU brands. Gaming features like Dark Stabilizer, AlienVision modes, and a built-in FPS counter give players extra control and awareness in-game. The monitor’s stand is fully adjustable with options to tilt, swivel, pivot, and adjust height for comfort during long gaming sessions. It also supports VESA mounting for flexible desk setups. For connectivity, the AW2523HF includes two HDMI 2.0 ports, one DisplayPort 1.4, four USB 3.2 Gen 1 downstream ports, a USB upstream port, headphone jack, and audio line-out. These ports make it easy to connect accessories and manage your setup neatly. In short, the Alienware 25″ 360Hz Gaming Monitor AW2523HF is a top-tier gaming monitor with extreme refresh rate, color accuracy, and gamer-friendly features. Specifications: Display : 24.5″ Fast IPS Resolution : 1920×1080 FHD Refresh Rate : 360Hz Response Time : 0.5ms
VIEWSONIC MONITOR TD2423 Display Size (in.): 24 Viewable Area (in.): 23.6 Panel Type: VA Technology Resolution: 1920 x 1080 Resolution Type: FHD (Full HD) Static Contrast Ratio: 3,000:1 (typ) Dynamic Contrast Ratio: 20M:1 Light Source: LED VIEWSONIC MONITOR Brightness: 250 cd/m² (typ) Colors: 16.7M Color Space Support: 8 bit (6 bit + Hi-FRC) Aspect Ratio: 16:9 Response Time (Typical GTG): 7ms Response Time (GTG w/OD): 7ms Response Time (Typical Tr+Tf): 25ms Viewing Angles: 178º horizontal, 178º vertical Backlight Life (Hours): 40000 Hrs (Min) Curvature: Flat Refresh Rate (Hz): 75 VIEWSONIC MONITOR Blue Light Filter: Yes Flicker-Free: Yes Color Gamut: NTSC: 72% size (Typ) sRGB: 104% size (Typ) Pixel Size: 0.272 mm (H) x 0.272 mm (V) Touch Screen: IR, 10-point multi-touch Surface Treatment: Glossy, Hard Coating (7H) Cover Glass Thickness: 1.85mm CompatibilityVIEWSONIC MONITOR TD2423 PC Resolution (max): 1920×1080 Mac® Resolution (max): 1920×1080 PC Operating System: Windows 7/8.1/10/11 certified; macOS tested Mac® Resolution (min): 1920×1080 Connector VGA: 1 USB 2.0 Type A: 2 USB 2.0 Type B: 1 3.5mm Audio In: 1 3.5mm Audio Out: 1 HDMI 1.4: 1 DVI-D: 1 Power in: 3-pin Socket (IEC C14 / CEE22) Specifications: VIEWSONIC MONITOR TD2423 Display Size (in.): 24 Viewable Area (in.): 23.6 Panel Type: VA Technology Resolution: 1920 x 1080 Resolution Type: FHD (Full HD) Static Contrast Ratio: 3,000:1 (typ) 1 Year Warranty Manufacturer link
LED feature Specification Display size 60.5 cm (23.8 in) diagonal Display type IPS with LED backlight Panel active area 52.7 x 29.6 cm (20.7 x 11.7 in) Scan range Horizontal: 30 to 80 KHz Vertical: 50 to 60 Hz Brightness 250 nits Color support Up to 16.7 million colors with the use of FRC technology Color gamut 72% Pixel pitch 0.2745 (H) mm x 0.2745 (V) mm 93 PPI Inputs 1 VGA 1 HDMI Audio in/Audio out HDCP support Viewing angle Horizontal viewing angle (typical): 178 degrees Vertical viewing angle (typical): 178 degrees Recommended resolution (H x V) 1920 x 1080 @ 60 Hz (Full HD) Aspect ratio 16:9 Static contrast ratio 1000:1 Dynamic contrast ratio 10,000,000:1 Response time 6 ms GtG w/OD 14 ms GtG (typ) / 28 ms GtG (Max) Power supply External Power consumption 30 Watts max Tilt -5 to +25 degrees Dimensions W x D x H (unpacked): 54.1 x 18.3 x 40.9 cm (21.3 x 7.2 x 16.1 in) Weight Unpacked: 3.1 Kg (6.8 lbs) Specifications: HP Monitor 24ea 23.8-inch IPS Display Display size 60.5 cm (23.8 in) diagonal Display type IPS with LED backlight Panel active area 52.7 x 29.6 cm (20.7 x 11.7 in)
PCE 1500 M8 1500VA 600W PCE UPS SYSTEM M8-1500 1500VA 600W Input Voltage: 220/230/240 VAC, 1Ø2Wires Input Frequency: 50 or 60 Hz +/-10% (auto sensing) Power: 600W Output voltage: 220/230/240VAC+/-1% Output Frequency: 50 or 60 Hz +/-1% Full Protection: Overload, discharge, and overcharge protection PCE UPS SYSTEM M8-1500 1500VA 600W Input Voltage: 220/230/240 VAC, 1Ø2Wires Input Frequency: 50 or 60 Hz +/-10% (auto sensing) Power: 600W Output voltage: 220/230/240VAC+/-1% Output Frequency: 50 or 60 Hz +/-1% Full Protection: Overload, discharge, and overcharge protection
