{"product_id":"18650-mobile-power-bank-diy-kit-case-in-black-or-white-colour-c9-model-with-dual-input-charging-for-external-battery-packs-dimensions-22mm-76mm-150mm-holds-six-18650-cells-with-5v-2a-output-capacity","title":"18650 mobile power bank DIY kit case in black or white colour, C9 model with dual input charging for external battery packs, dimensions 22mm × 76mm × 150mm holds six 18650 cells with 5V 2A output capacity","description":"\u003ch1\u003eC9 DIY 18650 Power Bank Case: Build a Custom Six-Cell Charging Kit\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"C9 DIY 18650 power bank case in black and white, showing six battery slots and dual USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US13\/1059\/2025-10-04\/original-image\/12933636970942.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eThis C9 model DIY external battery kit provides the housing and circuitry to construct your own portable power bank using standard 18650 lithium-ion cells. Designed for hobbyists and users seeking a tailored power solution, it accommodates six individual cells to determine total capacity based on the batteries you select. The unit features dual input charging through both Type-C and Micro USB ports, offering compatibility with common cables, and delivers a regulated 5V 2A output suitable for charging smartphones, tablets, and other USB-powered devices. Its compact form factor, measuring 22mm by 76mm by 150mm, maintains portability for travel, work, or outdoor use.\u003c\/p\u003e\n\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"C9 DIY 18650 power bank case in black and white, showing six battery slots and dual USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US13\/1059\/2025-10-04\/original-image\/1620226150676.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe C9 kit is centred around its modular design, allowing you to source and install your preferred 18650 cells. This section details its physical build and core electrical specifications.\u003c\/p\u003e\n\u003ch3\u003eMaterial and Build\u003c\/h3\u003e\n\u003cp\u003eThe case is constructed from a durable plastic housing that securely holds the internal battery cells and printed circuit board. The electronics are designed to manage the input and output power flows, supporting the dual charging inputs and providing a stable 5V 2A output. The build focuses on functionality for the DIY assembly process, with clear battery compartment layout and accessible ports.\u003c\/p\u003e\n\u003ch3\u003eSize and Practical Fit\u003c\/h3\u003e\n\u003cp\u003eWith external dimensions of 22mm in thickness, 76mm in width, and 150mm in length, the case is designed to be slender and hand-held. This size efficiently packs six 18650 cells in a rectangular layout, resulting in a power bank that can easily fit into a backpack, briefcase, or larger pocket. The measured dimensions are based on manual methods, so a tolerance of 1–3cm should be anticipated.\u003c\/p\u003e\n\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"C9 DIY 18650 power bank case in black and white, showing six battery slots and dual USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US13\/1059\/2025-10-04\/original-image\/193459488150.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eThis DIY kit suits users who need a reliable, customisable power source away from mains electricity. Its applications range from casual daily use to more prepared scenarios.\u003c\/p\u003e\n\u003ch3\u003eEvent or Professional Use\u003c\/h3\u003e\u003cp\u003eFor events, tradeshows, or fieldwork where access to charging points is limited, this power bank can be assembled with high-capacity 18650 cells to provide extended backup power. The 5V 2A output is compatible with most consumer electronics, allowing you to keep cameras, communication devices, or presentation tools operational. The dual input charging means you can recharge the bank using whichever cable is available at a power source.\u003c\/p\u003e\n\u003ch3\u003eEveryday Home Use\u003c\/h3\u003e\n\u003cp\u003eAround the home or office, the kit serves as a centralised charging bank for multiple devices. You can cycle through charging phones, wireless headphones, or smartwatches without needing individual adapters. Choosing between the black or white colour option lets the unit blend with your décor or tech accessories. Its DIY nature means you can replace individual cells over time if performance diminishes.\u003c\/p\u003e\n\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"C9 DIY 18650 power bank case in black and white, showing six battery slots and dual USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US13\/1059\/2025-10-04\/original-image\/3520097831401.webp\"\u003e\u003c\/div\u003e\n\u003cp\u003eThe primary advantages of this product stem from its customisability, straightforward design, and practical output specification.\u003c\/p\u003e\n\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\n\u003cp\u003eBecause you supply the 18650 cells, you can utilise new or recycled cells from other projects, potentially reducing waste. The kit itself has no consumable parts beyond the user-provided batteries; the case and board are designed for repeated use. Maintenance involves simply ensuring clean contacts and occasionally checking cell performance.\u003c\/p\u003e\n\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\n\u003cp\u003eThis DIY kit is selected for its clear specification—supporting six 18650 cells, dual input charging, and a 5V 2A output—all in a defined size. It avoids proprietary battery packs, giving you control over capacity and cell quality. The included components are ready for assembly, requiring no additional electronics work. For those comfortable handling lithium cells, it presents a cost-effective and adaptable alternative to pre-assembled power banks.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"C9 DIY 18650 power bank case in black and white, showing six battery slots and dual USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US13\/1059\/2025-10-04\/original-image\/4742600409947.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"C9 DIY 18650 power bank case in black and white, showing six battery slots and dual USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US13\/1059\/2025-10-04\/original-image\/483882245450.webp\"\u003e\u003c\/div\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"C9 DIY 18650 power bank case in black and white, showing six battery slots and dual USB ports.\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US13\/1059\/2025-10-04\/original-image\/5748645748292.webp\"\u003e\u003c\/div\u003e","brand":"2pfpkk-ds","offers":[{"title":"Black","offer_id":53055613010186,"sku":"CJSJYDSJ00082-Black","price":17.58,"currency_code":"GBP","in_stock":true},{"title":"White","offer_id":53055613042954,"sku":"CJSJYDSJ00082-White","price":17.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/9844\/7882\/files\/193459488150.webp?v=1778976387","url":"https:\/\/pocketsciencekids.com\/products\/18650-mobile-power-bank-diy-kit-case-in-black-or-white-colour-c9-model-with-dual-input-charging-for-external-battery-packs-dimensions-22mm-76mm-150mm-holds-six-18650-cells-with-5v-2a-output-capacity","provider":"PocketScienceKids","version":"1.0","type":"link"}