{"product_id":"diy-power-bank-box-case-4x18650-battery-charger-lcd-display-dual-input-8pin-micro-usb-dual-output-portable-external-battery-charger-power-bank-shell-black-white","title":"DIY Power Bank Box Case 4x18650 Battery Charger LCD Display Dual Input 8Pin Micro USB Dual Output Portable External Battery Charger Power Bank Shell Black White","description":"\u003ch1\u003eDIY Power Bank Box Case for 4x18650 Batteries – Custom Capacity with LCD Display and Dual Inputs\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"DIY power bank box case for 4x18650 batteries with LCD display, dual inputs, and dual outputs in black\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/1496725296846.webp\"\u003e\u003c\/div\u003e\u003cp\u003eBuilding your own portable power bank gives you full control over battery quality and capacity. This DIY power bank box case accepts four 18650 li-ion batteries, letting you avoid fakes and inferior cells. It doubles as a battery charger, making it a practical dual-use item. The compact 100x84x26mm case includes an LCD display that shows remaining capacity for each battery individually, plus dual inputs for convenient charging. Whether you need a reliable external supply for travel or a custom backup for gadgets, this case delivers flexibility and peace of mind.\u003c\/p\u003e\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"DIY power bank box case for 4x18650 batteries with LCD display, dual inputs, and dual outputs in black\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/1793584476497.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis power bank box is designed for practical, safe, and customisable use. Its independent circuit and reverse polarity protection ensure stable operation even with mismatched batteries.\u003c\/p\u003e\u003ch3\u003eIndependent Circuit Design\u003c\/h3\u003e\u003cp\u003eEach battery charges and discharges independently, so they can work together without interfering. This means you can charge the power bank and power a device at the same time, with the LCD showing each cell's level individually.\u003c\/p\u003e\u003ch3\u003eReverse Polarity Protection\u003c\/h3\u003e\u003cp\u003eIf a battery is inserted the wrong way, the internal chip automatically cuts power to that circuit and displays an empty battery level. Other circuits continue to operate normally, protecting both the case and your batteries.\u003c\/p\u003e\u003ch3\u003eLCD Display Screen\u003c\/h3\u003e\u003cp\u003eThe LCD screen clearly shows the remaining capacity for each of the four batteries individually. This makes it easy to monitor battery health and know when to recharge without guesswork.\u003c\/p\u003e\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"DIY power bank box case for 4x18650 batteries with LCD display, dual inputs, and dual outputs in black\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/1799409831863.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis case is ideal for anyone who wants a custom-power solution without the hassle of transporting built-in batteries. Use it as a portable power bank or a dedicated 18650 charger.\u003c\/p\u003e\u003ch3\u003eDIY Power Bank Building\u003c\/h3\u003e\u003cp\u003eChoose your own 18650 batteries to match your capacity needs. Whether you want a lightweight daily pack or a high-capacity backup, you control the build. The dual outputs let you charge two devices at once, like a phone and a tablet.\u003c\/p\u003e\u003ch3\u003eBattery Charger Function\u003c\/h3\u003e\u003cp\u003eUse the dual inputs (8 Pin and Micro USB) to charge your 18650 batteries directly. One cable is all you need to charge the power bank, making it a convenient all-in-one charger and power station.\u003c\/p\u003e\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"DIY power bank box case for 4x18650 batteries with LCD display, dual inputs, and dual outputs in black\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/3569862744741.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis product avoids the risks of pre-built power banks with unknown or fake batteries. You get guaranteed quality and custom capacity at a low upfront cost.\u003c\/p\u003e\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\u003cp\u003eBecause you supply the batteries, you can replace them individually when they wear out. The case itself is durable and reusable, saving money over disposable power banks.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\u003cp\u003eYou decide the capacity and battery core, rejecting false capacity and low-quality cells. The dual inputs and outputs, independent circuit, and LCD display add professional-level features to a simple DIY project. Available in Black or White.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"DIY power bank box case for 4x18650 batteries with LCD display, dual inputs, and dual outputs in black\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/5720018628560.webp\"\u003e\u003c\/div\u003e","brand":"huc4ji-en","offers":[{"title":"White","offer_id":57748460699979,"sku":"CJXFLPCD00071-White","price":34.75,"currency_code":"GBP","in_stock":true},{"title":"Black","offer_id":57748460732747,"sku":"CJXFLPCD00071-Black","price":34.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1042\/6086\/2283\/files\/5720018628560.webp?v=1782988240","url":"https:\/\/huc4ji-en.myshopify.com\/products\/diy-power-bank-box-case-4x18650-battery-charger-lcd-display-dual-input-8pin-micro-usb-dual-output-portable-external-battery-charger-power-bank-shell-black-white","provider":"WanderGoods","version":"1.0","type":"link"}