Dell OptiPlex 3280 All-in-One Desktop 210-AVPP-I3 Tech Specs Processor 10th Gen Intel® Core™ i3-10105T (6 MB cache, 4 cores, 8 threads, 3.00 GHz to 3.90 GHz Turbo, 35 W) Operating System Windows 10 Pro (Windows 11 Pro license included), English, French, Spanish Graphics Card Intel® Integrated Graphics Monitor OptiPlex All-in-One Non-Touch Panel Memory * 8 GB, 1 x 8 GB, DDR4 Hard Drive 256 GB, M.2 2230, PCIe NVMe, SSD, Class 35 Security Software No anti-virus software Protect your purchase – View Support offers below * 3 Years Hardware Service with Onsite/In-Home Service After Remote Diagnosis Accidental Damage Service None Keyboard Dell KB216 Wired Keyboard English, US Specifications: Dell OptiPlex 3280 All-in-One Desktop Tech Specs Processor 10th Gen Intel® Core™ i3-10105T (6 MB cache, 4 cores, 8 threads, 3.00 GHz to 3.90 GHz Turbo, 35 W) Operating System Windows 10 Pro (Windows 11 Pro license included), English, French, Spanish Graphics Card Intel® Integrated Graphics Monitor OptiPlex All-in-One Non-Touch Panel 1 Year Warranty
Lenovo IdeaCentre 5 Desktop – Intel Core i5-10105 – RAM 4GB – HDD 1TB 90RJ00BEAK-I5 Lenovo IdeaCentre 5 Desktop – Intel Core i5-10105 – RAM 4GB – HDD 1TB | 90RJ00BEAK-I5 Processor: Intel Core i5-10105, 6MB Cache, 4 Cores | 8 Threads, 3.6GHz up to 4.3GHz Memory: 4GB DDR4 Storage: 1TB HDD + Optional SSD M.2 Graphic Card:Intel UHD Graphics 630 Operating System: DOS I/O Ports: 1x USB 3.2 Gen 1; 1x USB 3.2 Gen 2; 1x USB-C 3.2 Gen 1 (support data transfer and 5V@3A charging); 1x headphone / microphone combo jack (3.5mm); 4x USB 2.0; 1x VGA; 1x HDMI 2.0; 1x Ethernet (RJ-45); 1x headphone (3.5mm) Wireless Connectivity: Wi-Fi 6, Bluetooth 5.2 Specifications: Specifications Lenovo IdeaCentre 5 Desktop – Intel Core i5-10105 – RAM 4GB – HDD 1TB 90RJ00BEAK-I5
Specifications : ACER Veriton S VS2680G Intel Core i5-11400 8GB 3200MHz (Up to 64GB) | 1TB 7200RPM HDD (4x SATA Ports) 8x Slim DVDRW | NVMe Support | w/ Keyboard+Mouse 4x Front USB 3 Ports (2x 1.5A Charging Support) + Serial Port + Parallel Port + 1x Combo + 1x Mic Port 1 Year Warranty manufacturer link
The Lenovo ThinkCentre M90a AIO 13AT001QUS delivers high-end desktop performance in a clean, space-saving all-in-one design suitable for professional environments. Therefore, offices and power users can maintain organized workspaces while still benefiting from strong computing power. Moreover, the system features an Intel Core Ultra 9 processor paired with 64GB RAM, allowing smooth multitasking across demanding applications, development tools, and business software. In addition, the 1TB NVMe SSD ensures fast system startup and rapid access to files and projects. The 23.8-inch Full HD touchscreen display supports a 120Hz refresh rate, providing fluid visuals and responsive interaction. Meanwhile, NVIDIA RTX 4050 graphics enable accelerated creative workloads, video editing, and GPU-supported applications. Furthermore, the included keyboard and mouse allow quick deployment, while Windows 11 Pro provides enterprise-grade security and productivity features. Consequently, this all-in-one PC becomes an ideal solution for companies and advanced users seeking performance, simplicity, and modern design in a single system. Specifications: Intel Core Ultra 9 285 processor combined with 64GB RAM for professional multitasking performance 23.8-inch Full HD touchscreen display with smooth 120Hz refresh rate NVIDIA RTX 4050 6GB graphics for content creation and advanced workloads High-speed 1TB NVMe SSD storage for fast boot and file access Includes keyboard, mouse, and Windows 11 Pro for a ready-to-work business setup
Dell Inspiron 7845SLV-PL 27 Tech Specifications : Processor 11th Gen Intel® Core™ i7-1165G7 (12 MB cache, 4 cores, 8 threads, up to 4.70 GHz Turbo) Operating System Windows 11 Home, English Graphics Card * Intel® Iris® Xe Graphics Display 27″, FHD 1920×1080, 60Hz, Touch, InfinityEdge Memory * 32 GB, 2 x 16 GB, DDR4, 2666 MHz Hard Drive 1 TB, M.2, PCIe NVMe, SSD Case & Color Touch Silver Stand A-Frame stand Microsoft Office No Microsoft Office Included McAfee Security Software McAfee LiveSafe 12 Month Subscription Protect your purchase – View Support offers below * 1 Year Hardware Service with Onsite/In-Home Service After Remote Diagnosis Accidental Damage Service None Keyboard White Dell KM636 Wireless Keyboard & Mouse Mouse Mouse included with Keyboard Ports 1 RJ-45 10/100/1000 1 USB 2.0 with Power on/Wake-up support 1 USB 3.1 Gen 1 1 USB 3.1 with Power on/Wake-up support 1 USB 3.1 Gen 1 with PowerShare 1 USB 3.1 Gen 2 Type-C™ 1 Microphone/Headset Jack 1 HDMI-out (1.4) 1 HDMI-in 1 DC Power Slots 1 SD Card Reader 3.0 1 Security lock slot Dimensions & Weight Black Bipod: 17.84″ (453.2 mm) x 24.08″ (611.7 mm) x 1.65″ (42 mm) Silver Arch: 17.84″ (453.2 mm) x 24.08″ (611.7 mm) x 1.65″ (42 mm) Silver A-Frame: 17.84″ (453.2 mm) x 24.09″ (611.9 mm) x 1.65″ (42 mm) Open Pop-Up Camera Height: 1.08″ (27.36 mm) Starting weight including stand: 15.5 lbs (7kg)* Chassis Color Options Black Rear Cover/Molded Chin Touch Silver Exterior Chassis Materials Rear Cover / Mid Frame – Plastic Bipod stand exterior – Plastic Arch Stand / A-Frame – Aluminum alloy Wireless Intel® Wi-Fi 6 2×2 (Gig+) and Bluetooth 5.1 Power 90 W AC Adapter 130 W AC Adapter Regulatory Compliance Product Safety and Environmental Datasheets Dell Regulatory Compliance Home Page Dell and the Environment California Energy Committee (CEC) MEPS – Certified configurations available Specifications: Specifications : I7700-7845SLV-PL 27 Inch | Dell Inspiron Intel Core I7-1165G7 32GB DDR41TB SSd Nvidia Geforce MX330 2GB W11 H 27 Inch Touchscreen 1 Year Warranty
Add $30 to replace with ASUS 24″ VA24HE or Samsung 27″ LS27C310 Looking to boost the performance of your Asus desktop S500SC-5115000040 without breaking the bank? We’ve got you covered with practical and budget-friendly tips to enhance your computing experience. Start by upgrading your desktop’s RAM. Adding more memory can significantly improve speed and multitasking capabilities, making your Asus desktop run smoother during demanding tasks. Consider investing in a solid-state drive (SSD) for faster data access and quicker boot times. This simple upgrade can breathe new life into your desktop, providing a noticeable performance boost. Explore external storage options for additional space without the need for a complete hardware overhaul. External hard drives or cloud storage solutions seamlessly expand your storage capacity. Upgrade your graphics card for an enhanced visual experience, especially if you’re into gaming or graphic-intensive applications. Asus offers a range of graphics cards suitable for different needs and budgets. Ensure your desktop is equipped with the latest software updates. Regular updates not only improve security but also enhance overall system performance, keeping your Asus desktop S500SC-5115000040 running optimally. Invest in a comfortable and ergonomic keyboard and mouse for a more enjoyable computing experience. Asus offers a variety of affordable options that cater to both work and gaming preferences. Organize your desktop space with cable management solutions. Tidy cables not only improve the aesthetics of your workspace but also contribute to a more efficient and clutter-free environment. In conclusion, upgrading your Asus desktop S500SC-5115000040 doesn’t have to be costly. By following these affordable tips, you can enjoy a more efficient and enjoyable computing experience without straining your budget. Elevate your workspace today! Specifications: Case : S500SC CPU : Core i5-11500 GPU : GT1030 PSU : Real 300W Board : Intel B560 RAM : 16GB Storage : 256GB NVMe Include : USB English Keyboard and Mouse Part Number : S500SC-5115000040
Specifications : ACER Veriton S VS2680G Intel Core i7-11700 8GB 3200MHz (Up to 64GB) | 512GB NVMe SSD (4x SATA Ports) | 8x Slim DVDRW | NVMe Support | w/ Keyboard+Mouse 4x Front USB 3 Ports (2x 1.5A Charging Support) + Serial Port + Parallel Port + 1x Combo + 1x Mic Port 1 Year Warranty manufacturer link
Specifications : CORE I7 11700 4GB DDR4 1TB HDD DVDRW | Card Reader USB Keyboard & Mouse Integrated Intel UHD Graphics 750 DOS 1 Year Warranty manufacturer link
Add $30 to replace with ASUS 24″ VA24HE or Samsung 27″ LS27C310 Looking to boost the performance of your Asus desktop S500SC-5114000060 without breaking the bank? We’ve got you covered with practical and budget-friendly tips to enhance your computing experience. Start by upgrading your desktop’s RAM. Adding more memory can significantly improve speed and multitasking capabilities, making your Asus desktop run smoother during demanding tasks. Consider investing in a solid-state drive (SSD) for faster data access and quicker boot times. This simple upgrade can breathe new life into your desktop, providing a noticeable performance boost. Explore external storage options for additional space without the need for a complete hardware overhaul. External hard drives or cloud storage solutions seamlessly expand your storage capacity. Upgrade your graphics card for an enhanced visual experience, especially if you’re into gaming or graphic-intensive applications. Asus offers a range of graphics cards suitable for different needs and budgets. Ensure your desktop is equipped with the latest software updates. Regular updates not only improve security but also enhance overall system performance, keeping your Asus desktop S500SC-5114000060 running optimally. Invest in a comfortable and ergonomic keyboard and mouse for a more enjoyable computing experience. Asus offers a variety of affordable options that cater to both work and gaming preferences. Organize your desktop space with cable management solutions. Tidy cables not only improve the aesthetics of your workspace but also contribute to a more efficient and clutter-free environment. In conclusion, upgrading your Asus desktop S500SC-5114000060 doesn’t have to be costly. By following these affordable tips, you can enjoy a more efficient and enjoyable computing experience without straining your budget. Elevate your workspace today! Specifications: Case : S500SC CPU : Core i5-11400 PSU : Real 300W Board : Intel B560 RAM : 8GB Storage : 256GB NVMe Include : USB English Keyboard and Mouse Part Number : S500SC-5114000060
CPU CELERON , RAM 4GB , SSD 128GB +BUILT IN RECIEPT PRINTER 80MM 1 YEAR WARRANTY
The PCE EX Online 6 KVA 5400W is a high-capacity online UPS built for strong power protection in offices and business environments. This UPS delivers clean and stable electricity even during severe power issues. Moreover, its true double-conversion design removes surges, sags, and spikes for safe device operation. Therefore, it fits companies and users who need dependable backup without interruption. First, the PCE EX Online 6 KVA 5400W supplies pure sine wave output for sensitive electronics like servers, workstations, and networking gear. This helps protect your devices from damage and performance drops. In addition, the online design ensures seamless switching between mains and battery power. As a result, connected equipment stays powered without sudden shutdowns during outages. Next, this UPS supports a high load capacity for multiple systems at once. You can run large setups including computers, storage units, and critical machinery. Furthermore, advanced battery management maximizes runtime and extends battery health. This means longer backup support when power cuts last. Meanwhile, the LCD display shows real-time status, load, and battery info for easy monitoring. The durable build quality makes the unit reliable for daily heavy use and long operational hours. Additionally, installation and setup are quick, with minimal steps required. Consequently, you save time and avoid complex configurations. Also, the UPS includes advanced safety features to prevent overloads and short circuits for extra peace of mind. Smart communication options integrate with software for automatic shutdown and alert notifications. This keeps systems protected even when you are away. Moreover, the UPS runs quietly and remains cool under full load without noise disruption. Therefore, it fits well in busy workspaces without distraction. Overall, the PCE EX Online 6 KVA 5400W delivers seamless power backup, strong protection, and stable performance. It provides great value for users who need reliable power security for critical systems. Specifications: Voltage : 220V, 230V, or 240V Capacity :12v/7Ah Frequency:50/60 Hz
The ProLink PRO851SFCU Super Fast Charging UPS is designed to provide reliable backup power and voltage protection for computers, networking equipment, and home electronics. It helps keep essential devices operating during short power interruptions and unstable electrical conditions. The UPS provides an 850VA capacity and features line interactive technology with Automatic Voltage Regulation (AVR). Additionally, AVR helps stabilize voltage fluctuations and protects connected devices from overvoltage and undervoltage conditions. The ProLink PRO851SFCU features super-fast charging technology that significantly reduces battery recharge time after power outages. Moreover, this feature helps ensure the UPS is ready for future interruptions more quickly. The UPS includes multiple protection functions against overload, short circuit, surge, and battery discharge conditions. Furthermore, these protection features help improve the safety and reliability of connected equipment. The PRO851SFCU includes LED status indicators that allow users to monitor operating conditions easily. Therefore, users can quickly check power status, battery mode, and system operation. The compact design makes the UPS suitable for homes, offices, and small workspaces. In addition, it provides dependable backup support for desktop computers, routers, CCTV systems, and other important electronic devices. The ProLink PRO851SFCU Super Fast Charging UPS combines backup power, fast battery charging, AVR technology, and safety features. As a result, it provides a practical and reliable power protection solution for everyday use. Specifications: Capacity : 850VA Input : 230VAC Output : 230VAC Input Voltage : 510W Transfer Time : 2ms Battery Type : 12V/10Ah x1 Backup Time : 10-30 Min Part Number : PRO851SCFU
The Beco GP800 800VA 480W UPS delivers dependable power protection for home and office electronics. It keeps devices running during short power cuts. This helps prevent data loss and sudden shutdowns. Users enjoy peace of mind with reliable backup power. Moreover, the Beco GP800 UPS features 800 VA capacity and 480 W output power for stronger protection. It supports desktops, routers, modems, and monitors easily. Devices stay powered long enough to save work. Performance remains stable. In addition, the UPS includes built-in surge protection for safety against spikes. It guards appliances from voltage surges and unstable power conditions. This adds extra defense during storms or power fluctuations. Protection stays consistent. Furthermore, the Beco GP800 800VA 480W UPS offers automatic voltage regulation without manual adjustment. It corrects voltage dips and spikes smoothly. This helps maintain steady performance for connected devices. Reliability improves everyday use. Also, the unit provides battery backup during outages to keep systems running. You can finish tasks and save files before shutdown. This reduces the risk of data corruption. Battery backup feels dependable. In addition, the Beco GP800 UPS includes clear LED indicators for power and battery status. You can check conditions at a glance. This makes monitoring simple and fast. Users stay informed. Furthermore, the Beco GP800 UPS supports easy installation and setup. Users can plug in devices quickly without complicated steps. Setup remains stress-free for beginners and experts. Overall, the Beco GP800 800VA 480W UPS delivers reliable battery backup, surge protection, and stable power output. It protects electronics and supports uninterrupted use. This UPS is ideal for users seeking strong, everyday power protection. Specifications: 800VA, 480W, LED, Plastic Case Input: 140-290 VAC Output: 230VAC 50/60HZ 12V 9AH *1pc, Universal Socket *2 + EU Plug With AVR, Bypass output Overload and short circuit protection
UPS battery 12V 7A Battery for UPS 7A 12v
APC Easy UPS SRV, 1600 Watts / 2 KVA, Online double conversion, Sine wave, 230V, Multi-function LCD status and control console, Surge Protection and Filtering, Generator compatible, Management Software, USB, 2 years warranty Electronics and Battery
The PCE PCD 12V 100Ah Deep Cycle Battery delivers strong and reliable power for many applications. It offers a larger 100Ah capacity for extended use. This helps engines, systems, and devices run longer between charges. Users experience dependable energy when needed most. Moreover, the PCE PCD Deep Cycle Battery uses a deep cycle design built for repeated discharge and recharge. It supports long-term use without damage. This increases the battery’s lifespan and reduces replacements. Performance remains consistent over time. In addition, the battery provides a stable 12 V output for balanced power delivery. It suits solar systems, RVs, marine setups, and backup power solutions. Power stays steady for lights and appliances. Daily use becomes more efficient. Furthermore, the PCE PCD 12V 100Ah Deep Cycle Battery features a rugged casing that protects internal cells. The strong build resists wear and harsh conditions. This helps maintain performance in many environments. Durability feels reassuring. Also, the battery supports deep discharge recovery for long service life. It recovers well after heavy use cycles. This improves energy storage and reliability. Users rely on strong power anytime. In addition, the PCE PCD Deep Cycle Battery is easy to install in compatible racks and holders. Connections stay secure and simple. Setup feels user-friendly for both beginners and professionals. Installation remains smooth. Furthermore, the PCE PCD Deep Cycle Battery performs steadily across varying temperatures. It stays reliable in moderate heat and cold. This makes it ideal for outdoor and mobile use. Overall, the PCE PCD 12V 100Ah Deep Cycle Battery delivers dependable power, long life, and robust performance. It fits homes, boats, RVs, and solar systems. This battery is perfect for users who want strong, lasting deep cycle energy every day. Specifications: Voltage : 12V Capacity : 100Ah
PCE CASA 1KVA inverter is a compact off-grid power solution designed for home and small office backup use. It helps keep essential devices running during power cuts, such as routers, lights, and small electronics. In addition, it provides pure sine wave output. Therefore, it delivers clean and stable power for sensitive devices. Moreover, it supports AC mains and generator input, which makes it flexible in different power conditions. Furthermore, PCE CASA 1KVA inverter includes smart battery charging control. As a result, it improves charging efficiency and helps extend battery life. It also supports automatic restart after power recovery, ensuring continuous operation. In addition, it includes built-in protection features. Therefore, it helps protect against overload, short circuit, and overheating. Moreover, it supports a cold start function for direct battery operation when no grid power is available. Overall, PCE CASA 1KVA inverter delivers reliable backup performance, stable output, and essential protection for everyday home and office energy needs. Specifications: 1KVA capacity for home and small office loads Pure sine wave output for stable device operation AC mains and generator input support Smart battery charging control for efficiency Built-in protection against overload and short circuit
The APC UPS 600W 1000VA Line Interactive BV1000I-GR provides reliable backup power for home and office devices. First, it delivers line-interactive output to protect equipment from voltage fluctuations. In addition, it safeguards connected devices against surges, spikes, and short outages. Moreover, the compact design allows easy placement on desks or near electronics. Finally, the UPS includes LED indicators to monitor battery and load status. The BV1000I-GR ensures uninterrupted operation and protects important electronics during power interruptions. Specifications: 600W / 1000VA line-interactive output protects devices Safeguards against power surges, spikes, and outages Compact design for easy placement on desks or near electronics LED indicators monitor battery and load status Ensures uninterrupted operation during short power interruptions
Powerology Portable Power Generator,140400mAh Powerology 140400mAh Power Generator 500W Pure Sine-Wave Output -45W USB-C Power Delivery -18W USB-A Quick Charge -3.1A Dual USB Optimal Charge -220V UK AC Output -750W Max Surge
The Twist Line Interactive UPS 1500VA TWUP1500/LI provides backup power protection for computers, networking devices, and office equipment. It uses line interactive technology with automatic voltage regulation for stable output performance. Additionally, the built-in dual 12V/7Ah batteries support continued operation during power interruptions. Moreover, the UPS includes LED status indicators for clear power monitoring and system alerts. It also supports overload and short-circuit protection for safer daily operation. Therefore, it helps protect connected devices from voltage fluctuations and sudden outages. Furthermore, the compact tower design fits home and office environments easily. The system also supports cold start functionality and simulated sine wave output for common electronic devices. Additionally, the automatic battery charging system improves operational reliability. Specifications: 1500VA line interactive UPS technology Built-in 2x12V/7Ah rechargeable batteries LED indicators for power status monitoring Automatic voltage regulation for stable output Overload and short-circuit protection system
The Twist Line Interactive UPS 850VA TWUP850/LI provides backup power protection for computers, networking devices, and office electronics. It uses line interactive technology with automatic voltage regulation for stable power delivery. Additionally, the built-in 12V/7Ah battery supports continued operation during power interruptions. Moreover, the UPS includes LED status indicators for clear system monitoring. It also supports cold start functionality for startup without direct AC power. Therefore, it helps protect connected devices from voltage fluctuations and sudden outages. Furthermore, the compact tower design fits easily in home and office environments. The system also includes overload and short-circuit protection for safer daily operation. Additionally, the simulated sine wave output supports common desktop and networking equipment. Specifications: 850VA line interactive UPS technology Built-in 1x12V/7Ah rechargeable battery LED indicators for power status monitoring Automatic voltage regulation for stable output Overload and short-circuit protection system
The PROLINK PRO1201 1200VA Super-Fast Charging UPS AVR is designed to provide reliable backup power and voltage protection for computers, networking equipment, and home electronics. It helps keep connected devices running during short power interruptions. The UPS provides a 1200VA capacity and uses Automatic Voltage Regulation (AVR) technology. Additionally, it helps stabilize unstable voltage levels to protect connected equipment from power fluctuations. The PROLINK PRO1201 features super-fast charging technology that helps reduce battery recharge time. Moreover, it allows the UPS to recover power faster after an outage and prepares it for future use. The UPS includes multiple protection features to help protect connected devices. Furthermore, it provides protection against overload, short circuit, surge, and low battery conditions during operation. The PROLINK PRO1201 features LED indicators that display important operating status information. Therefore, users can easily check the UPS condition and power status. The compact design makes the UPS suitable for homes, offices, and small workspaces. In addition, it provides a practical backup solution for computers, routers, and other essential devices. The PROLINK PRO1201 1200VA Super-Fast Charging UPS AVR combines backup power, voltage regulation, fast charging, and safety features. As a result, it provides reliable power support for everyday electronic equipment. Specifications: Capacity: 1200VA / 720W Technology: Automatic Voltage Regulation (AVR) Charging: Super-Fast Charging Technology Protection: Overload, Short Circuit, Surge, Low Battery Protection Display: LED Status Indicators
The PCE PCD 12V 65Ah Deep Cycle Battery delivers dependable power for a wide range of applications. It provides stable energy over long discharge cycles. This battery supports regular use in marine, RV, solar, and backup power systems. It fits well where lasting performance matters. Moreover, the PCE PCD Deep Cycle Battery features a deep cycle design for long life and strong reliability. It tolerates repeated charging and discharging without damage. This increases uptime and reduces maintenance needs. Users enjoy continuous power without frequent replacements. In addition, the battery delivers 12 V and 65 Ah capacity for steady power delivery. This suits medium and high demand systems. Appliances, lights, and electronics receive reliable current. It helps systems stay stable in everyday use. Furthermore, the PCE PCD 12V 65Ah Deep Cycle Battery includes sturdy construction for long-lasting durability. The strong casing protects internal cells against wear and tear. This adds confidence in heavy use environments. Performance remains consistent over time. Also, the battery supports deep discharge recovery for extended service life. It recovers well even after heavy drain cycles. In addition, the PCE PCD Deep Cycle Battery is easy to install in many setups. It fits most battery holders and racks without fuss. Connections remain secure and simple. Furthermore, the PCE PCD Deep Cycle Battery supports stable performance in varying temperatures. It remains reliable in moderate heat and cold. This helps outdoor and mobile applications. Overall, the PCE PCD 12V 65Ah Deep Cycle Battery delivers strong power, lasting durability, and smooth performance. It fits home, marine, solar, and backup use. This battery is ideal for users who want dependable deep cycle energy every day. Specifications: Voltage : 12V Capacity : 65Ah
The APC Smart-UPS RC 800W 1KVA Sine Wave SRC1KI provides reliable backup power for critical devices. First, it delivers pure sine wave output, ideal for sensitive electronics. In addition, the UPS protects connected equipment from power surges, spikes, and outages. Moreover, it features a compact design for easy placement in offices or server rooms. Finally, the unit includes an intuitive LCD interface for monitoring battery status and load. The SRC1KI ensures continuous operation and safeguards important systems during power interruptions. Specifications: 800W / 1KVA pure sine wave output for sensitive devices Protects against power surges, spikes, and outages Compact design for office or server room placement LCD interface for monitoring battery and load status Ensures continuous operation during power interruptions
