{"product_id":"diy-power-bank-and-18650-battery-charger-with-lcd-display-screen-and-reverse-polarity-protection-black-or-white-mobile-power-box-measuring-100x84x26-mm-with-dual-usb-outputs-and-dual-inputs-for-custom-portable-power-supply","title":"DIY power bank and 18650 battery charger with LCD display screen and reverse polarity protection, black or white mobile power box measuring 100x84x26 mm with dual USB outputs and dual inputs for custom portable power supply","description":"\u003ch1\u003eDIY Mobile Power Box and 18650 Battery Charger with LCD Screen\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Black and white DIY mobile power box and 18650 battery charger with LCD screen and USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/1496725296846.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis versatile mobile power box provides a practical solution for creating a custom portable power supply tailored to your specific needs. By allowing you to insert up to four standard 18650 lithium-ion batteries, it enables you to determine the exact capacity of your power bank, moving away from pre-built units with potentially inflated specifications. The unit serves a dual purpose, functioning both as a portable external battery pack for charging smartphones, tablets, and other small electronics, and as a dedicated charger for your 18650 cells. With its compact dimensions of 100 mm in length, 84 mm in width, and 26 mm in height, it offers a portable power management station that features clear monitoring and protective circuitry for safe operation.\u003c\/p\u003e\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Black and white DIY mobile power box and 18650 battery charger with LCD screen and USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/1793584476497.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThe core design of this power box centres on user-configurable power and clear system feedback. Its construction houses the necessary circuitry for managing multiple battery cells independently, allowing for simultaneous charging and discharging operations.\u003c\/p\u003e\u003ch3\u003eMaterial and Build\u003c\/h3\u003e\u003cp\u003eThe product is housed in a plastic casing that contains the internal electronic boards, LCD screen, and connection ports. This build provides a lightweight yet protective enclosure for the user's own 18650 batteries. The independent circuit design for each battery allows charge and discharge processes to work concurrently without interfering with each other, a practical feature for continuous power access.\u003c\/p\u003e\u003ch3\u003eSize and Practical Fit\u003c\/h3\u003e\u003cp\u003eWith external dimensions of 100x84x26 mm, the power box maintains a footprint suitable for travel or desktop use. This size accommodates the space needed for up to four 18650 cells, the dual-output USB ports, the LCD display, and the dual input charging ports. The compact form factor makes it a portable central unit for managing power on the go.\u003c\/p\u003e\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Black and white DIY mobile power box and 18650 battery charger with LCD screen and USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/1799409831863.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThe product's functionality supports a range of scenarios from technical DIY projects to everyday gadget charging. Its primary value lies in putting power capacity and battery management directly in the user's control.\u003c\/p\u003e\u003ch3\u003eEvent or Professional Use\u003c\/h3\u003e\u003cp\u003eFor events, fieldwork, or professional settings requiring reliable off-grid power, this box allows the assembly of a high-capacity power bank using known-quality 18650 batteries. Users can select high-drain or high-capacity cells suited to their specific devices, from cameras to comms equipment. The dual outputs enable charging two essential items at once, while the LCD screen provides clear visibility of remaining power for each cell during use.\u003c\/p\u003e\u003ch3\u003eEveryday Home Use\u003c\/h3\u003e\u003cp\u003eIn domestic settings, it serves as a versatile charging station. It can recharge standard 18650 batteries used in torches, vapes, or other household items while simultaneously acting as a power bank for smartphones or tablets via its USB outputs. The reverse polarity protection offers peace of mind for less technical users when inserting batteries, as it prevents damage from incorrect installation.\u003c\/p\u003e\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Black and white DIY mobile power box and 18650 battery charger with LCD screen and USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/3569862744741.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThe key advantages of this power box stem from its customisable nature and transparent operation, contrasting with sealed commercial power banks. It provides long-term utility through its adaptable design and clear information display.\u003c\/p\u003e\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\u003cp\u003eThe product promotes reuse and reduces waste by functioning as a permanent charging platform for standard 18650 batteries, which can be replaced as needed over time. Its maintenance is minimal, primarily involving keeping the ports clear of debris. The protective circuitry, including the reverse polarity feature, helps safeguard both the unit and the batteries from user error, contributing to its operational longevity.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\u003cp\u003eThis unit is chosen for its control and clarity. It allows you to build a power bank with a verifiable capacity based on your chosen batteries, rejecting the uncertainty of pre-assembled units. The LCD display delivers exact, per-cell capacity readings, removing guesswork about remaining charge. The dual-role functionality as both a device charger and a battery charger adds practical value, consolidating two tools into one compact 100x84x26 mm unit available in black or white.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Black and white DIY mobile power box and 18650 battery charger with LCD screen and USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/1225\/2025-10-02\/original-image\/5720018628560.webp\"\u003e\u003c\/div\u003e","brand":"bygmmn-fb","offers":[{"title":"Black","offer_id":57539548217675,"sku":"CJXFLPCD00071-Black","price":33.88,"currency_code":"GBP","in_stock":true},{"title":"White","offer_id":57539548250443,"sku":"CJXFLPCD00071-White","price":33.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/9700\/7435\/files\/5720018628560.webp?v=1781006080","url":"https:\/\/doverelle.com\/products\/diy-power-bank-and-18650-battery-charger-with-lcd-display-screen-and-reverse-polarity-protection-black-or-white-mobile-power-box-measuring-100x84x26-mm-with-dual-usb-outputs-and-dual-inputs-for-custom-portable-power-supply","provider":"Doverelle","version":"1.0","type":"link"}