{"product_id":"zarin-20000mah-power-bank-fast-charging-portable-battery-pack-compact-design","title":"Zarin 20000mAh Power Bank Fast Charging Portable Battery Pack Compact Design | Buy Online in Pakistan at MetroCart","description":"\u003ch2\u003eReliable Power Backup - 20000mAh Capacity Keeps Your Devices Charged All Day\u003c\/h2\u003e\u003cp\u003eThe Zarin 20000mAh Power Bank delivers dependable portable charging with its massive battery capacity that can fully charge most smartphones 4-5 times before needing to be recharged itself. This high-capacity power bank is engineered for people who depend on their devices throughout the day, whether for work, travel, or entertainment. The 20000mAh capacity represents approximately 74 watt-hours of stored energy, providing enough power to charge an iPhone 13 about 4.5 times, a Samsung Galaxy S21 approximately 4 times, or an iPad Mini twice from empty to full.\u003c\/p\u003e\u003cp\u003eThe power bank features dual output ports that allow you to charge two devices simultaneously, making it perfect for charging your phone and tablet at the same time, or sharing power with a friend or colleague. The intelligent charging technology automatically detects connected devices and delivers the optimal charging current for each one, ensuring fast and safe charging without risk of overcharging or overheating. The built-in smart chip regulates power distribution, protecting both the power bank and your devices from electrical damage.\u003c\/p\u003e\u003cp\u003eDespite its substantial capacity, the Zarin power bank maintains a relatively compact and portable form factor. The sleek white design with black display window gives it a modern, professional appearance that looks at home in any setting, from business meetings to coffee shops. The smooth matte finish resists fingerprints and scratches while providing a comfortable grip. The rectangular shape with rounded edges fits easily in bags, backpacks, or even large pockets, making it convenient to carry wherever you go.\u003c\/p\u003e\u003cp\u003eThe LED digital display is a standout feature that sets this power bank apart from basic models. The clear numerical readout shows the exact remaining battery percentage, eliminating the guesswork of traditional LED indicator lights. You'll always know precisely how much power you have available, allowing you to plan your charging needs accordingly. The display activates automatically when you press the power button or connect a device, then turns off after a few seconds to conserve battery.\u003c\/p\u003e\u003ch3\u003eKey Features and Technology\u003c\/h3\u003e\u003cp\u003eThe 20000mAh lithium polymer battery uses advanced cell technology that provides high energy density in a relatively compact package. Lithium polymer batteries offer several advantages over older lithium-ion designs, including lighter weight, lower self-discharge rates, and better safety characteristics. The battery maintains its charge well during storage, losing only about 5-10% of capacity per month when not in use, compared to 15-20% for older battery technologies.\u003c\/p\u003e\u003cp\u003eThe dual USB output ports support different charging speeds to accommodate various devices. The standard output typically delivers 5V\/2.1A for regular charging, while many models include a quick charge port that can deliver higher voltages and currents for compatible fast-charging devices. Some smartphones can charge from 0% to 50% in just 30 minutes when using the fast charge port with an appropriate cable. The input port accepts standard micro-USB or USB-C charging, depending on the model, and supports relatively fast recharging of the power bank itself, typically taking 6-8 hours to fully recharge from empty using a 2A wall adapter.\u003c\/p\u003e\u003cp\u003eThe intelligent protection system includes multiple safety features that monitor and regulate the charging process. Overcharge protection prevents the power bank from accepting more power once fully charged, extending battery lifespan. Over-discharge protection automatically shuts down the power bank before the battery drains to damaging levels. Short circuit protection immediately cuts power if a short is detected. Temperature monitoring prevents operation if the device becomes too hot or too cold. Overcurrent protection limits the maximum current draw to safe levels. These comprehensive safety features provide peace of mind during charging.\u003c\/p\u003e\u003cp\u003eThe durable construction uses high-quality ABS plastic housing that resists impacts, drops, and daily wear. The materials are fire-resistant and meet international safety standards for electronic devices. The internal components are securely mounted and protected from vibration and shock. The charging ports are reinforced to withstand repeated cable insertion and removal. With proper care, this power bank will provide reliable service for years.\u003c\/p\u003e\u003ch3\u003ePerfect For\u003c\/h3\u003e\u003cp\u003eBusiness professionals who spend long days away from power outlets will appreciate having reliable backup power for their smartphones, tablets, and other USB-powered devices. The high capacity ensures you can make it through full workdays, long meetings, and business travel without worrying about battery anxiety. The professional appearance makes it appropriate for corporate environments.\u003c\/p\u003e\u003cp\u003eTravelers find power banks essential for long flights, train journeys, and days of sightseeing where charging opportunities are limited. The 20000mAh capacity is substantial enough for multi-day trips, and the ability to charge multiple devices makes it perfect for couples or families traveling together. The compact size fits easily in carry-on luggage, and the capacity is within airline limits for lithium batteries in passenger cabins.\u003c\/p\u003e\u003cp\u003eStudents benefit from having portable power during long days on campus, study sessions in libraries, or outdoor studying where outlets aren't available. The power bank can keep laptops, tablets, phones, and e-readers charged throughout the day. The affordable price point makes it accessible for student budgets while delivering reliable performance.\u003c\/p\u003e\u003cp\u003eOutdoor enthusiasts, campers, and hikers use power banks to keep their devices charged during extended outdoor adventures. While not waterproof, the durable construction withstands the rigors of outdoor use. The high capacity means you can go several days without access to wall power while still keeping essential devices like phones, GPS units, and cameras charged.\u003c\/p\u003e\u003cp\u003eEmergency preparedness is another important use case. Having a fully charged power bank stored in your emergency kit ensures you can keep communication devices powered during power outages, natural disasters, or other emergencies. The long shelf life means it will hold its charge for months between uses.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cp\u003eBefore first use, fully charge the power bank by connecting it to a wall adapter using the included charging cable. Plug the micro-USB or USB-C end into the power bank's input port and the USB end into a wall adapter rated for at least 2A output. The LED display will show the charging progress, typically starting at whatever percentage the power bank was shipped with and increasing until it reaches 100%. Initial charging may take 8-10 hours depending on the starting charge level.\u003c\/p\u003e\u003cp\u003eTo charge your devices, press the power button on the power bank to activate it. The LED display will illuminate and show the current battery percentage. Connect your device's charging cable to one of the USB output ports on the power bank. Your device should begin charging automatically. If you have two devices to charge, connect the second device to the other output port. The power bank will distribute power appropriately between both devices.\u003c\/p\u003e\u003cp\u003eMonitor the LED display periodically to check remaining power. When the percentage drops below 20%, start planning to recharge the power bank soon. When you're finished charging your devices, disconnect the cables. The power bank will automatically shut off after a few seconds of inactivity to conserve power. If you want to turn it off immediately, press and hold the power button for 2-3 seconds.\u003c\/p\u003e\u003cp\u003eRecharge the power bank regularly, ideally before it drops below 20% capacity. Avoid letting it fully discharge frequently, as this can reduce battery lifespan over time. For optimal battery health, try to keep the charge level between 20% and 80% for daily use, only fully charging when you know you'll need the maximum capacity.\u003c\/p\u003e\u003ch3\u003eCare and Maintenance\u003c\/h3\u003e\u003cp\u003eStore the power bank in a cool, dry place away from direct sunlight and heat sources. Extreme temperatures can damage the battery and reduce its lifespan. Ideal storage temperature is between 15-25°C. If you won't be using the power bank for an extended period, charge it to approximately 50-70% before storage and recharge it every 3-4 months to prevent deep discharge.\u003c\/p\u003e\u003cp\u003eKeep the power bank clean by wiping it with a soft, dry cloth. For stubborn dirt or smudges, use a slightly damp cloth with mild soap, then dry immediately. Never submerge the power bank in water or expose it to moisture, as this will damage the internal electronics. Keep the charging ports clean and free of debris by occasionally blowing out dust with compressed air or using a soft brush.\u003c\/p\u003e\u003cp\u003eUse quality charging cables and adapters. Cheap, poorly made cables can cause charging problems or even damage the power bank or your devices. Stick with cables from reputable manufacturers or the original cables that came with your devices. Avoid using damaged cables with frayed wires or bent connectors.\u003c\/p\u003e\u003cp\u003eHandle the power bank gently and avoid dropping it or subjecting it to strong impacts. While the construction is durable, severe impacts can damage internal components or the battery cells. Don't place heavy objects on top of the power bank or store it where it might get crushed.\u003c\/p\u003e\u003cp\u003eIf you notice any unusual behavior such as excessive heat during charging, swelling of the case, unusual odors, or failure to charge properly, discontinue use immediately and contact the manufacturer. These symptoms may indicate battery damage or failure. Never attempt to open or repair the power bank yourself, as lithium batteries can be dangerous if mishandled.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20000mAh (74Wh)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLithium Polymer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Port\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMicro-USB or USB-C (model dependent)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\/Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V\/2A (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2× USB-A ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\/Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5V\/2.1A per port (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Output Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10.5W (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLED digital percentage display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharging Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6-8 hours (with 2A adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhone Charges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-5 full charges (typical smartphone)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTablet Charges\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1-2 full charges (typical tablet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 100 grams\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApproximately 14cm × 7cm × 2.5cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite with black display window\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eABS plastic housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSafety Features\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOvercharge, over-discharge, short circuit, temperature, overcurrent protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE, FCC, RoHS compliant (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cp\u003eEach package contains one Zarin 20000mAh power bank and one micro-USB or USB-C charging cable for recharging the power bank. Note that device charging cables are not included - you'll need to use your own device's charging cable to charge your phone, tablet, or other devices from the power bank. Some packages may include a user manual with specifications and basic operating instructions.\u003c\/p\u003e\u003ch3\u003eImportant Considerations\u003c\/h3\u003e\u003cp\u003eThe actual usable capacity of any power bank is less than the rated capacity due to energy conversion losses. The 20000mAh rating refers to the battery cell capacity at 3.7V, but USB charging operates at 5V, requiring voltage conversion that loses approximately 20-30% efficiency. Additionally, your device's charging circuit and cable resistance cause further losses. Realistically, expect to deliver about 12000-14000mAh of usable charge to your devices, which is still enough for 4-5 smartphone charges.\u003c\/p\u003e\u003cp\u003eCharging speed depends on multiple factors including the power bank's output capability, your device's charging circuit, cable quality, and whether you're using the device while charging. For fastest charging, use quality cables, don't use your device while charging, and ensure the power bank is adequately charged. Some devices may not support fast charging or may charge at reduced speeds when the power bank's battery is low.\u003c\/p\u003e\u003cp\u003eAir travel regulations limit lithium battery capacity in carry-on luggage to 100Wh, and this 74Wh power bank is well within that limit. However, power banks must be carried in cabin baggage, not checked luggage. Check with your specific airline for their policies, as regulations can vary by carrier and destination.\u003c\/p\u003e\u003cp\u003eThe power bank will gradually lose capacity over time and with repeated charge cycles. Lithium polymer batteries typically retain 80% of their original capacity after 300-500 full charge cycles. Proper care and avoiding extreme temperatures can help maximize lifespan, but eventually, all rechargeable batteries degrade and need replacement.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Power Bank\u003c\/h3\u003e\u003cp\u003eThe Zarin 20000mAh power bank offers an excellent balance of capacity, portability, and affordability. The 20000mAh capacity is the sweet spot for most users - large enough to provide multiple device charges but not so large that it becomes heavy or cumbersome to carry. Smaller capacity power banks require more frequent recharging, while larger ones are significantly heavier and bulkier.\u003c\/p\u003e\u003cp\u003eThe LED digital display provides valuable information that basic LED indicator lights cannot match. Knowing your exact remaining percentage allows for better planning and eliminates the frustration of running out of power unexpectedly. This feature alone makes the power bank more user-friendly than many competitors.\u003c\/p\u003e\u003cp\u003eThe dual output ports add versatility that single-port models lack. Being able to charge two devices simultaneously is incredibly convenient and can be a real advantage when traveling with family or colleagues. The intelligent charging technology ensures both devices receive appropriate power without compromising safety or charging speed.\u003c\/p\u003e\u003cp\u003eAt this price point, the power bank represents excellent value for the capacity and features provided. Quality power banks from premium brands can cost two to three times as much for similar specifications. The Zarin brand delivers reliable performance and build quality at a more accessible price, making it an smart choice for budget-conscious buyers who don't want to sacrifice quality or safety.\u003c\/p\u003e","brand":"MetroCart","offers":[{"title":"Default Title","offer_id":51533488750872,"sku":"3754304","price":4599.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/7560\/3480\/files\/2025_12_11_f8ea4b3e2d56385979555cef947fb989.png?v=1767876568","url":"https:\/\/metrocart.pk\/products\/zarin-20000mah-power-bank-fast-charging-portable-battery-pack-compact-design","provider":"Metro Cart","version":"1.0","type":"link"}