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
The Yuasa SWL2500T Industrial VRLA Battery delivers reliable power for industrial and backup applications. First, it provides consistent energy output for critical equipment and systems. In addition, the valve-regulated lead-acid (VRLA) technology ensures maintenance-free operation and extended service life. Moreover, the battery features durable construction, vibration resistance, and high discharge efficiency for demanding environments. The compact design allows easy installation in various setups. Finally, its dependable performance, safety features, and long-term reliability make it ideal for industrial, UPS, and emergency power systems. Specifications: VRLA Technology: Maintenance-free operation with long service life High Discharge Efficiency: Reliable power for critical equipment Durable Construction: Resistant to vibration and harsh environments Compact Design: Easy installation in various industrial setups Industrial Reliability: Ideal for UPS, backup, and emergency power
APC UPS Accessories SRVRK2 APC Easy UPS RAIL KIT, 900MM, 1 – 10KVA (Rackable SRV models)
UPS battery 12V 7A Battery for UPS 7A 12v
UPS HAWK 2000VA 2kva 1 year warranty
The Beco Mini DC UPS 8800mAh delivers compact and reliable power backup for small DC devices. It offers emergency power without bulky hardware. This helps protect devices during brief outages or unstable power. Users enjoy continuous operation with confidence. Moreover, the Beco Mini DC UPS features an 8800mAh battery for extended backup time. It supports devices like routers, cameras, and small electronics. This ensures continuous functionality when mains power fails. Backup power stays dependable. In addition, the DC UPS supports automatic switching when power cuts occur. It detects outages instantly and activates backup power without delay. This keeps your devices running smoothly. Protection remains seamless and reliable. Furthermore, the Beco Mini DC UPS includes stable DC output for sensitive electronics. Power delivery stays steady even under load. This helps reduce risk of damage. Devices operate without sudden stops. Also, the UPS delivers a compact and portable design for easy placement anywhere. You can install it near devices without taking much space. This adds convenience for small homes and offices. In addition, the Beco Mini DC UPS 8800mAh supports multiple connection options for flexible use. It works with DC devices requiring uninterrupted power. Also, the compact and sturdy casing improves durability for daily use. The build feels reliable and long‑lasting. Users can trust the UPS for regular backup needs. Overall, the Beco Mini DC UPS 8800mAh delivers dependable backup power, seamless switching, and flexible use in a compact form. It is ideal for small DC devices needing continuous power and stable operation. Specifications: MINI DC UPS POE 8800mah, 17W Built-in Lithium Battery 2200mAh*4 5VDC USB output, 3*Sockets DC output Interface 5V/9V/12V Over charge, Over discharge, Overload, & Short circuit protection Microprocessor controller guaranties high reliability Multi-LED Status Indicator For: Routers, CCTVs, Modem, Wireless Phones, Monitors, PSP, and others
The Beco GP2000 2000VA 1200W UPS delivers dependable power protection for home, office, and business systems. It supports high-demand devices like desktops, servers, and networking equipment. This UPS helps prevent data loss and sudden shutdowns during power interruptions. Users enjoy peace of mind with reliable backup. Moreover, the Beco GP2000 2000VA 1200W UPS features a 2000 VA capacity and 1200 W output power for strong performance. It maintains stable power for multiple connected devices. This helps keep critical systems running longer during outages. Reliability stays consistent. In addition, the UPS includes built-in surge protection for safe operation against voltage spikes. It guards your electronics from unpredictable power surges. This adds extra defense during storms or unstable conditions. Device safety remains a priority. Furthermore, the Beco GP2000 2000VA 1200W UPS offers automatic voltage regulation to smooth dips and spikes. It balances fluctuating power automatically. This strengthens system reliability and helps extend equipment life. Power stays steady without manual changes. Also, the UPS provides battery backup when electricity fails. You can save work and shut down systems properly before power runs out. This reduces risk of data corruption. Backup power feels dependable and secure. In addition, the Beco GP2000 2000VA 1200W UPS includes easy-to-read LED indicators for power and battery status. You can check conditions at a glance. This makes monitoring clear and simple. Users stay informed during operation. Moreover, the UPS supports multiple output sockets for connecting several devices simultaneously. This increases flexibility for desks, workstations, and server setups. You can protect many electronics at once. Furthermore, the Beco GP2000 2000VA 1200W UPS supports easy installation with plug-and-play setup. Connections are marked clearly for simple use. Setup remains quick and stress-free. Also, the compact and sturdy design fits neatly on desks or shelves. It blends into home and office spaces easily. Portability stays practical. Overall, the Beco GP2000 2000VA 1200W UPS delivers strong battery backup, surge protection, and smooth voltage regulation. This UPS is perfect for users needing powerful and reliable power protection every day. Specifications: 2000VA, 1200W, LCD, Plastic Case Input: 140-290 VAC Output: 230VAC 50/60HZ 12V 9AH *2pcs, Universal Socket *4 + EU Plug With AVR, Bypass output Overload and short circuit protection
The PROLINK Enerhome PRO2000 Line Interactive UPS 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 and unstable power conditions. The UPS provides a 2KVA capacity and uses Automatic Voltage Regulation (AVR) technology. Additionally, it helps correct voltage fluctuations and provides stable power output to improve equipment protection. The PROLINK PRO2000 features a line interactive design that allows quick switching to battery mode during power failures. Moreover, it provides efficient backup support for essential devices while reducing power-related risks. The UPS includes protection features against overload, short circuit, surge, and low battery conditions. Furthermore, these safety functions help protect connected equipment during different operating situations. The PROLINK Enerhome PRO2000 is suitable for homes, offices, and small workspaces that need dependable power backup. Therefore, it provides a practical solution for protecting computers, routers, and other important electronic devices. The compact design makes the UPS easy to install in different environments. In addition, its reliable performance helps users maintain stable operation during unexpected power interruptions. The PROLINK Enerhome PRO2000 2KVA Line Interactive UPS combines backup power, AVR voltage regulation, and protection features. As a result, it provides a reliable power solution for everyday electronic equipment. Specifications: Capacity: 2000VA / 1200W Technology: Line Interactive with AVR Protection: Overload, Short Circuit, Surge, Low Battery Protection Input Voltage: 220VAC Output Voltage: 220VAC
APC UPS Accessories SRVRK1 APC Easy UPS RAIL KIT, 700MM, 1 – 10KVA (Rackable SRV models)
UPS ONLINE 2KVA 1600W PURE SINEWAVE 1 YEAR WARRANTY
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
The Prolink Online UPS 10KVA with LCD and Internal Battery is designed to provide stable power protection for servers, networking equipment, and critical electronic systems. It helps maintain continuous operation during power failures and protects devices from unstable power conditions. The UPS provides a 10KVA capacity and uses online double conversion technology. Additionally, it delivers clean and stable power output to support sensitive equipment that requires reliable energy performance. The Prolink Online UPS features an LCD display that allows users to monitor important system information. Moreover, the screen shows details such as input voltage, output voltage, battery status, load level, and operating conditions for easier management. The UPS includes an internal battery system that provides backup power during outages. Furthermore, it supports protection features against overload, short circuit, over-temperature, and battery problems to help protect connected devices. The Prolink Online UPS is suitable for offices, data centers, and professional environments that need continuous power support. Therefore, it provides a practical backup solution for important equipment that requires stable electricity. The UPS combines high capacity, online power protection, battery backup, and monitoring features in one system. As a result, it helps users maintain reliable power performance during unexpected interruptions. Specifications: Capacity: 10KVA UPS Type: Online Double Conversion Display: LCD Display Battery: Internal Battery System Protection: Overload, Short Circuit, Over Temperature Protection
Key Features Output Connections (1) IEC 60320 C19 Input Connections Schuko CEE 7 / EU1-16P Cord Length 8.2ft (2.5meters) Power Cord, C19 to CEE/7 Schuko, 2.5m Wide selection of Rack PDU power cords for a variety of IT equipment. Specifications : Output Overload Protection No Maximum Total Current Draw 16 Input Input frequency 50/60 Hz Acceptable Input Voltage 90 – 250VAC Number of Power Cords 1 Maximum Input Current 16A Maximum Line Current 16A Physical Net Weight 0.49lbs. (0.22KG) Shipping weight 0.66lbs. (0.3KG) Shipping Height 2.01inches (51MM, 5.1CM) Shipping Width 4.02inches (102MM, 10.2CM) Shipping Depth 7.99inches (203MM, 20.3CM) Color Black Environmental Operating Temperature 32 – 113 °F (0 – 45 °C) Operating Relative Humidity 0 – 95 % Operating Elevation 0 – 10000ft (0 – 3048meters) Storage Temperature -25 – 65 °C Storage Relative Humidity 0 – 95 % Storage Elevation 0 – 50000ft (0 – 15240meters) manufacturer link
APC UPS Accessories SMX48RMBP2U APC Smart-UPS X-Series 48V External Battery Pack Rack/Tower for SMX1000, SMX1500, SMX750
INVO Online INH600 INVO Online UPS High Frequency 6000 VA, LCD Display Inbuilt Battery 16 x 12V/7Ah online ups system high frequency and high load management. Full Specifications : AC Input Bypass AC Output Battery Fault Screen LCD AC Input Bypass AC Output Battery Fault Screen LCD 6 KVA/4200W Half -Load 120 -300VAC, Full -Load 165V -300VAC 176V`~276VAC Frequency 45.5Hz ~ 54.5Hz Power Factor 0.95 Output Voltage 220/230/240V ± 3% Waveform True Sine wave Frequency 50/60Hz ± 0.5 Distortion <3%(linear Load); <5%(Non -linear Load) Crest Factor 3:1 Efficiency 85% Overload Capacity 110%-150%:Switch to Bypass after 1min; >150%:Shutdown afte r 200ms Short Circuit UPS output turn off and alarm Battery Model 12V Sealed Lead -Acid Voltage 36DC 96DC 240C Configuration Recharge 90% Capacity after 8 Hours charging RS232 ;SNMP (Optional) LCD & LED Utility, Inverter, Bypass, Battery, Load ,Battery Mode ,Frequency , UPS Fault Indicator Audible Alarm -Battery Discharge Utility Failure, Beep/4s;Battery Low, Beep/1s UPS Abnornmal Continuous Beep and Red Led On Noise <55db (1Meter) Temperature 0°C~40°C Humidity 10%~90% Optional 19 inch Rack -mount Dimension (W * D * H) mm 357 x 144 x 215 439x190x341 514X262X455 (Long Time Mode) 514x262x710 (Standard Model) Specifications: Specifications : AC Input Bypass AC Output Battery Fault Screen LCD AC Input Bypass AC Output Battery Fault Screen LCD 1 year warranty Manufacturer Link
Features and performances x Outstanding efficiency and overload. x Perfect management and limitation of AC sources. x Power shaving of the consumption peaks. x Automatic allocation of the power available. x Active filtering of the load steps on the genset. x Automatic protection of the sources against overload. x Powerful multi-stage PFC charger. x Ultra-short transfer time (from 0 to 15ms max.). x Automatic and efficient stand-by. x Compatible with AC coupling. x Display, programming and data logging. x RS-232 communication for remote supervision. x iPS Dim. : 44.50x20x17.2( LxWxH cm ) , 17.50 x 7.87×6.8 ( LxWxH inch) x Carton box Dim.: 53.5×30.5×30.5 (LxWxH cm) , 21.65×11.8×12 (LxWxH inch) x Weight : 25Kg ( 55lbs ) Model iPS 3700-24 Inverter Nominal battery voltage 24V Input voltage range 19 – 34V Continuous power @ 25°C 2000W Power 30 min. @ 25°C 2800W Power 25 sec. @ 25°C 5.6kVA Maximum load Up to short-circuit Maximum asymmetric load Up to Continuous power Load detection (stand-by) 2 to 25 W Maximum efficiency 86 – 90% Consumption OFF/Stand-by/ON 3W / 9W / 70W Output voltage Sine wave 220Vac (+/- 2%) / 190-245Vac Dynamic behavior 5 ms (on load change 0 to 100%) Overload and short-circuit Automatic disconnection up to 10 times restart attempt Overheat protection Warning before shut – with automatic restart Battery charger 6 step adjustable : I-U-Uo-Equalize-Uo(low)-U(periodic) Charging current adjustable 0 – 45A Maximum input voltage 265Vac Input AC voltage range Adjustable threshold from 150 to 265Vac Battery control Absorption end By duration 2 / 0.25 – 10 h or by current – / 4 – 30A Absorption voltage** 28.8 / 19 – 34V Periodic absorption voltage** 19 – 34V Floating voltage** 27.2 / 19 – 34V Reduced floating voltage 19 – 34V Equalization** By number of cycles (1 – 100) or at set interval (52 weeks) Equalization end By duration 4 / 0.25 – 10 h or by current – / 4 – 30A Deep-discharge protection 21.6 / 19 – 34V Reduced floating time 0 – 32 days Periodic absorption time 0 – 10 hours General data iPS 3700-24 Auxiliary Output 2 independent Transistor short circuit protected outputs Auxiliary Input 2 Opto Coupler Programmable Input 10V Æ 60VDC Net Weight 25Kg ( 55lbs ) Weight with the cartoon box 26.2Kg (57.5lbs) 1 Year warranty
Specifications : Le grand ups keor spx 2kva 2000va 1200w ups 2kva 1 year warranty
The SkyGate Mini DC UPS 20000mAh is a powerful and compact solution for uninterrupted power. Whether you need backup power for your router, modem, or other devices, this mini UPS has you covered. With a 20000mAh capacity, the SkyGate Mini DC UPS ensures your devices stay powered during outages or unexpected power cuts. This high-capacity battery provides extended usage time, keeping your essentials running smoothly. The SkyGate Mini DC UPS is designed for versatility, featuring multiple output options. It supports DC 9V/12V, USB 5V, and Type C, making it compatible with a wide range of devices, from routers to smartphones. Setting up the SkyGate Mini DC UPS is simple and hassle-free. Its plug-and-play functionality allows you to connect your devices quickly, ensuring uninterrupted power with minimal effort. The SkyGate Mini DC UPS is equipped with intelligent safety features, including overcharge protection, over-discharge protection, and short-circuit protection. These features ensure safe and reliable operation, protecting your devices from damage. Compact and portable, the SkyGate Mini DC UPS is easy to carry and store. Its lightweight design makes it perfect for use at home, in the office, or even on the go. In conclusion, the SkyGate Mini DC UPS 20000mAh offers reliable backup power with a high-capacity battery and versatile output options. Keep your devices running smoothly during power outages with this efficient and portable mini UPS. Specifications: Battery : 20000mAh Output Power : 18W POE Port : 24V/0.7A DC Port : 9V/2A, 12V/1.5A Output Ports : 5V/2A USB, 5V/1A Type-C
The Twist Online High Frequency UPS 10KVA TWUP10000/HF delivers continuous backup power for servers, networking systems, and critical business equipment. It uses online double conversion technology for stable and clean power output. Additionally, the high-frequency design improves efficiency and minimizes transfer interruptions. Moreover, the UPS includes an LCD display for real-time monitoring and system alerts. It features internal 20x12V/9Ah batteries for backup operation during outages. Therefore, it helps protect sensitive equipment from voltage fluctuations and sudden power failures. Furthermore, the TWUP10000/HF supports pure sine wave output for stable operation with professional equipment. It also includes overload, short-circuit, and overheating protection for safer daily use. Additionally, the tower design fits server rooms, office environments, and IT installations easily. Specifications: 10KVA online double conversion UPS technology Internal 20x12V/9Ah rechargeable batteries LCD display for real-time monitoring Pure sine wave output for stable power delivery Overload and short-circuit protection system
PCE EX Online 3 KVA 2700W is a double-conversion online UPS designed for continuous and stable power protection. It is used for sensitive equipment such as servers, network systems, and critical office devices that require uninterrupted electricity. In addition, PCE EX Online 3 KVA 2700W uses online double-conversion technology. Therefore, it provides zero transfer time between mains and battery mode. Moreover, it delivers clean and stable pure sine wave output for safe operation of connected devices. Furthermore, PCE EX Online 3 KVA 2700W supports a 3000VA / 2700W capacity rating. As a result, it can handle high-load systems such as multiple PCs and networking equipment. It also maintains consistent voltage regulation for sensitive electronics during unstable power conditions. In addition, PCE EX Online 3 KVA 2700W includes advanced protection features. Therefore, it guards against overload, short circuits, voltage fluctuations, and power failures. Moreover, it is designed for long-duration reliability in professional environments. Overall, PCE EX Online 3 KVA 2700W delivers strong performance, zero-interruption switching, and high-level protection for critical power backup needs. Specifications: 3000VA / 2700W high-capacity output Online double-conversion UPS technology Zero transfer time for uninterrupted power Pure sine wave output for sensitive devices Advanced protection against overload and faults
Hawk Ups 1500VA Input: Phase: Single + GND. Voltage Range: 165-275V/ 82V-138V. Frequency: 50/60Hz +- 10%. Output: Voltage Range: 220/230/240/110/120V +- 10%. Wave Form: Sine wave ( Mains), Square Waves (inverter). Frequency: 50/60Hz +- 1% (Batter Mode). Crest Factor: 3:1. Transfer time: <10ms. Protection: Energy rating: 320 Joules Instantaneous response. Test Standard: IEEE 587 Cat. A&B. Noise Filtering: EMI/RFI: Full Time Suppression. Communication: RS232 or USB with PC monitoring software and cable (optional). Battery: Type: Sealed Lead-acid. Quantity: (x2) 12V8A. Backup Time: 15-20min depends on the load.
Aokly Gel Battery 12V – 200A 58.5Kg manufacturer link
The INVO INSR Stabilizer offers automatic voltage regulation for homes and offices. It supports single-phase input from 1000 VA to 5000 VA, covering multiple needs . Moreover, it features a clear LCD that shows input and output voltages. This stabilizer uses a sturdy metal cabinet to protect internal parts. Also, it adds a three-second power delay to protect connected devices . Therefore, your appliances start safely after power returns. It comes in models such as INSR1000, 1500, 2000, 3000, and 5000 VA. This range suits small PCs to mid-sized equipment and appliances . Additionally, installation is easy via wall mount or tabletop placement. Built-in protections include overvoltage, undervoltage, and overload safety. This helps prevent damage during electrical fluctuations. It also resists heat and short circuit events. Thus, it keeps both electronics and home safe. Thanks to its servo-controlled design, it delivers steady output within ±3%. Hence, your sensitive devices run smoothly and securely. It also operates quietly, ideal for offices and study rooms. Plus, it’s energy efficient and requires minimal maintenance. Furthermore, its LCD display and simple controls make setup fast. The stabilizer supports various uses like PCs, printers, routers, TVs, and appliances. In short, the INVO INSR Stabilizer combines solid performance, safety, and ease. Choose this device when you need dependable voltage control at home or office. Specifications: INSR300 INVO Automatic Voltage Regulator 3000VA, LCD Display ,Single Phase, Metal Cabinet, Delay 3 secs INSR200 INVO Automatic Voltage Regulator 2000VA, LCD Display ,Single Phase, Metal Cabinet, Delay 3 secs INSR150 INVO Automatic Voltage Regulator 1500VA, LCD Display ,Single Phase, Metal Cabinet, Delay 3 secs INSR100 INVO Automatic Voltage Regulator 1000VA, LCD Display ,Single Phase, Metal Cabinet, Delay 3 secs INSR50 INVO Automatic Voltage Regulator 1000VA, LCD Display ,Single Phase, Metal Cabinet, Delay 3 secs
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 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
