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 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
Specifications : GENERAL Rated Power 5000VA / 5000W Communication Interface Removable USB / RS232 / RS485 / Bluetooth / Dry-contact Dimension D x W x H (mm) 115 x 300 x 400 Net Weight (kgs) 13 INPUT Voltage 230VAC Selectable Voltage Range 170 ~ 280 VAC (For Personal Computers)90 ~ 280 VAC (For Home Appliances) Frequency Range 50Hz / 60Hz (Auto sensing) OUTPUT AC Voltage Regulation (Batt. Mode) 230VAC ± 5% Surge Power 10000VA Efficiency (Peak) 90% ~ 93% Transfer Time 15 ms (For Personal Computers)20 ms (For Home Appliances) Waveform Pure sine wave BATTERY Battery Voltage 48VDC Floating Charge Voltage 54VDC Overcharge Protection 63VDC SOLAR & AC CHARGER Solar Charger Type MPPT Maximum PV Array Open Circuit Voltage 500VDC Maximum PV Array Power 5000W MPP Range @ Operating Voltage 120VDC~450VDC Maxmum Solar Charge Current 100A Maximum AC Charge Current 100A manufacturer link
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
APC UPS Accessories APV9601 EASY UPS ON-LINE SNMP CARD, 1 – 10KVA (SRV models)
The PCE Battery 12V 9Ah is a reliable and efficient power solution for various applications. Whether you need backup power for a UPS system or energy for your equipment, this battery ensures consistent performance. With a 12V output and 9Ah capacity, the PCE Battery delivers the power you need to keep your devices running smoothly. It’s ideal for use in security systems, emergency lighting, and other critical equipment. Designed for durability, the PCE Battery offers a long lifespan and requires minimal maintenance. Its sealed, lead-acid design ensures that it remains leak-proof and safe for use in different environments. The PCE Battery 12V 9Ah is compatible with a wide range of devices and systems. Whether you’re using it for home backup, industrial equipment, or a solar energy system, it provides dependable power when needed. This battery features advanced technology for efficient energy storage and reliable discharge. It also includes built-in safety features like overcharge and short-circuit protection, ensuring safe and stable operation. One of the key benefits of the PCE Battery is its easy installation. Whether you’re an expert or a beginner, this battery can be quickly installed and connected to your system with minimal effort. In conclusion, the PCE Battery 12V 9Ah is a perfect combination of reliability, performance, and safety. Choose this battery for a stable power supply and enjoy long-lasting energy for all your essential devices. Specifications: Voltage : 12V Capacity : 9Ah
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
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 1KVA TWUP1000/HF delivers stable backup power for servers, networking devices, and office equipment. It uses online double conversion technology for continuous clean power output. Additionally, the high-frequency design improves efficiency and reduces switching interruptions. Moreover, the UPS includes an LCD display for real-time monitoring and system status updates. It also features built-in 2x12V/9Ah batteries for backup operation during outages. Therefore, it protects connected devices from voltage fluctuations, surges, and power loss. Furthermore, the TWUP1000/HF supports pure sine wave output for sensitive electronic equipment. It also includes overload, short-circuit, and overheating protection for safer operation. Additionally, the compact tower design fits home, office, and IT environments easily. Specifications: 1KVA online double conversion UPS technology Built-in 2x12V/9Ah rechargeable batteries LCD display for system monitoring Pure sine wave output for stable power Overload and short-circuit protection system
Specifications : GENERAL UPS Type : Tower Phase : Single phase with ground Rating (VA) : 2000 Nominal Power (W) : 1600 Standard Model Dimension (mm) : 397x 145 x 220 (D x W x H) Weight (kg) : 17 Long-run Model Dimension (mm) : 397 x 145 x 220 (D x W x H) Weight (kg) : 6.8 INPUT Connection Type : IEC 320-C14 Nominal Voltage : 200/208/220/230/240 VAC Voltage Range : 110-300 VAC (Load at 50%) 160-280 VAC (Load at 100%) Frequency Range : 45 ~ 70 Hz Power Factor : >= 0.99 OUTPUT Connection Type : 3 x Universal socket (PRO902WS) 2 x Universal socket (PRO902WL) Nominal Voltage : 200/208/220/230/240 VAC Voltage Regulation : ±1% Frequency Range (Synchronized Range) : 47 ~ 53 Hz or 57 ~ 63 Hz Frequency Range (Batt. Mode) : 50 Hz ± 0.25 Hz or 60 Hz ± 0.3 Hz Current Crest Ratio : 3:1 Harmonic Distortion ; ≤3% THD (Linear load) ≤6% THD (Non-linear load) ALARM & INDICATORS Battery Mode : Sounding every 4 seconds Low Battery : Sounding every second Overload : Sounding twice every second Fault : Continuously sounding LCD : Load level, Battery Level, AC mode, Battery mode, Bypass mode and Fault CONNECTIVITY, CONTROL & MONITORING Front panel : Status LED, Function keys, LCD display Communication : Smart RS232* USB : Port BATTERY Standard Model Type : 12V / 9Ah Numbers : 4 Typical Recharge Time : 4 hours recover to 90% capacity Long-run Model Type : Depending on the capacity of external batteries Number : 4/6/8 Charging Current (max) : 1A / 2A / 4A / 6A Adjustable REAR PANEL 1. AC Input 2. Input circuit breaker 3. USB Communication port 4. RS-232 communication port 5. Intelligent slot 6. External battery connection (Only available for L model) 7. Output receptacles
The PROLINK PRO1501SFC Super Fast Charging UPS is designed to provide reliable backup power and voltage protection for computers, networking equipment, and office electronics. It helps maintain device operation during power interruptions and unstable electrical conditions. The UPS provides a 1500VA capacity and uses line interactive technology with Automatic Voltage Regulation (AVR). Additionally, AVR helps correct voltage fluctuations and provides stable power for connected equipment. The PROLINK PRO1501SFC features super-fast charging technology that reduces battery recharge time after power outages. Moreover, this allows the UPS to recover faster and become ready for future power interruptions. The UPS includes protection features against overload, short circuit, surge, and battery discharge. Furthermore, these safety functions help protect connected devices from common electrical issues. The PROLINK PRO1501SFC provides reliable backup support for homes, offices, and small work environments. Therefore, it is suitable for computers, routers, CCTV systems, and other essential electronic devices. The UPS features a practical design for easy installation and daily use. In addition, its line interactive operation provides efficient power management while maintaining equipment protection. The PROLINK PRO1501SFC Super Fast Charging UPS combines 1500VA backup capacity, AVR technology, fast charging, and protection features. As a result, it provides a dependable power solution for everyday electronic equipment. manufacturer link Specifications: Capacity: 1500VA / 900W Technology: Line Interactive UPS with AVR Charging: Super Fast Charging Technology Protection: Overload, Surge, Short Circuit, Battery Protection Application: Computer, Network, and Office Equipment Backup
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
UPS battery 12V 7A Battery for UPS 7A 12v
The Eaton 9E UPS Online Double Conversion 6000VA 4800W is a powerful and reliable power backup solution. It ensures uninterrupted power for critical devices, protecting them from outages and fluctuations. This UPS uses advanced double-conversion technology for maximum power reliability. It provides consistent and clean power, making it perfect for sensitive equipment like servers, medical devices, and data centers. The Eaton 9E UPS delivers 6000VA (4800W) of capacity, making it suitable for high-load environments. Its robust design ensures consistent performance even during extended power outages. This makes it ideal for businesses that cannot afford downtime. Setting up the UPS is simple, and it integrates seamlessly into existing systems. It comes with an intuitive LCD interface, making monitoring and management straightforward. You can easily view critical information, such as load levels, battery status, and alerts. The Eaton 9E UPS also features a scalable runtime. You can add additional battery modules to extend backup time as your needs grow. This flexibility ensures long-term usability and value. With its compact footprint, the UPS saves space in your office or server room. Its energy-efficient design reduces operating costs while ensuring reliable performance. This UPS is equipped with advanced features, such as remote monitoring capabilities. Using Eaton’s management software, you can monitor and control the UPS from anywhere. The Eaton 9E UPS Online Double Conversion 6000VA 4800W is a reliable investment for protecting your critical systems. Ensure uninterrupted power for your business with this advanced and efficient UPS solution. Specifications: Wattage : 4800W VA Rating : 6000 VA
PCE MX Online 3KVA 2700W is a high-performance online double-conversion UPS designed for critical power protection. It provides continuous, clean, and stable electricity for servers, network systems, and sensitive electronic equipment. In addition, PCE MX Online 3KVA 2700W uses true online double-conversion technology. Therefore, it delivers zero transfer time between mains and battery mode. Moreover, it provides pure sine wave output to ensure safe operation of connected devices. Furthermore, PCE MX Online 3KVA 2700W supports a 3000VA / 2700W load capacity. As a result, it can handle demanding setups such as multiple PCs and networking equipment. It also maintains stable voltage regulation under fluctuating input conditions. In addition, PCE MX Online 3KVA 2700W includes advanced protection features. Therefore, it guards against overload, short circuits, and power instability. Moreover, it is designed for professional environments that require uninterrupted power availability. Overall, PCE MX Online 3KVA 2700W delivers strong backup performance, zero-interruption switching, and reliable protection for critical systems. Specifications: 3000VA / 2700W high-capacity output Online double-conversion UPS technology Zero transfer time for uninterrupted power Pure sine wave output for sensitive equipment Overload and short-circuit protection system
INVO online INH1000 NVO Online UPS High Frequency 10000 VA, LCD Display Inbuilt Battery 16 x 12V/9 Ah 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
Specifications : Le grand ups keor spx 1500va fr _310303 UPS 1500va
Specifications : High Reliability Advanced DSP (Digital signal processors) technology Variable speed fan Effective software and hardware protection function, robust self-diagnostic function, and abundant event log for check Advanced digital parallel technology High Availability Wide input voltage range, 50 / 60 Hz frequency auto sensing Linear derating in low voltage input reducing battery discharging times, extending the service life of battery Dual-input design, supporting independent bypass Output power factor improved from 0.9 to 1, load capacity increased by 13% Flexible battery configuration (settable 16 – 20 pcs batteries) Charging voltage and current configured by demands Ability to switch on the UPS with batteries Settable delayed start time when mains power is restored, reducing the impact on power grid or generator Two modes of frequency conversion: 50 Hz input / 60 Hz output or 60 Hz input / 50 Hz output High Usability LCD+LED display, multi-functional keys operation, friendly human-machine interface Powerful background software for parameters configuration and online updating Compact internal layout, miniaturized the complete unit for small footprint High Intelligence Advanced multi-platform communications: RS232, USB, RS485, SNMP and dry contacts communication interfaces Intelligent battery management, automatic floating / equalizing charge control, charger dormancy control, increasing battery life by 50% Energy Conservation and Environment Protection Active power factor correction (APFC), input power factor up to 0.99 High efficiency 95% (up to 98% in ECO mode) Automatic power On/Off according to the load capacity set by users Equipped with self-aging function
UPS ONLINE 2KVA 1600W PURE SINEWAVE 1 YEAR WARRANTY
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
APC UPS Accessories SURT192RMXLBP2 APC Smart-UPS RT192V RM 15/20KVA SURT models Battery Pack 2 Rows
MARSRIVA SMART MINI DC UPS 10000MAH Capacity: 10000mAh / 37Wh. Output Interface: USB-A Output: 5V at 2.4A, DC Output: 5V / 9V / 12V (selectable) at 1.5A, POE Output: 5V at 2.4A. Dimensions: 104.5 x 170 x 30.8 mm. Net Weight: 360g. Color: Black. Specifications: MARSRIVA SMART MINI DC UPS 10000MAH Capacity: 10000mAh / 37Wh. Output Interface: USB-A Output: 5V at 2.4A, DC Output: 5V / 9V / 12V (selectable) at 1.5A, POE Output: 5V at 2.4A. Dimensions: 104.5 x 170 x 30.8 mm. Net Weight: 360g. Color: White.
Original product name: UPS 5E650IUSBDIN Eaton Line Interactive UPS 650VA / 360W, AVR, 1 Schuko (DIN) + 2 IEC, USB port, software, Input / Output jacks included for Telephone / Modem / Internet Line surge protection, 2 Years Warranty (Including Battery) 5E650IUSBDIN Eaton Line Interactive UPS 650VA / 360W, AVR, 1 Schuko (DIN) + 2 IEC, USB port, software, Input / Output jacks included for Telephone / Modem / Internet Line surge protection 2 Years Warranty (Including Battery)
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.
The PROLINK PRO700 Line Interactive UPS is designed to provide reliable backup power and protection for computers, networking devices, and other electronic equipment. It helps maintain stable operation during power interruptions and voltage fluctuations. With a 650VA capacity and 360W output power, this UPS provides practical power support for home and office environments. Additionally, its line-interactive design with AVR technology helps regulate voltage and improve power stability. The PRO700 supports a wide input voltage range from 140V to 300V AC. Moreover, it automatically senses 50Hz or 60Hz input frequency, allowing compatibility with different power environments. The UPS provides simulated sine wave output during battery mode and sine wave output during AC mode. Furthermore, the fast transfer time helps reduce interruptions when switching to battery operation. The built-in 12V 8.2Ah battery provides backup power for connected devices during outages. Therefore, users can safely save work and shut down equipment during unexpected power failures. The PROLINK PRO700 includes protection features against short circuits, overloads, discharge, and overcharge conditions. In addition, its intelligent battery management helps improve battery protection and lifespan. The compact design makes the UPS suitable for desktops, network equipment, and small office setups. Also, its low noise operation allows comfortable use in different working environments. The PROLINK PRO700 Line Interactive UPS combines voltage regulation, backup power, and essential protection features in a compact solution. As a result, it provides dependable power support for everyday electronic devices. Specifications: Capacity: 650VA / 360W Input Voltage Range: 140V–300V AC ±5% Battery: 12V / 8.2Ah sealed lead-acid battery Output Waveform: Simulated sine wave (Battery Mode) Protection: Short circuit, overload, discharge, and overcharge protection
