{"product_id":"li-ion-battery-case-adapter-for-makita-18v-dual-usb-ports-power-bank-phone-charger-led-working-light-converter-lamp-flashlight","title":"Li-ion Battery Case Adapter — Rechargeable Battery Holder with USB Output","description":"\u003ch2\u003eTurn Rechargeable Cells Into a Power Bank.\u003c\/h2\u003e\u003cp\u003eThis Li-ion battery case adapter lets you use standard rechargeable lithium cells as a portable USB power source. Load it with compatible cells, connect your device to the USB output, and you have a power bank that you can refuel with fresh cells rather than replacing the entire unit. It’s a practical, cost-effective approach to portable power for anyone who already uses rechargeable cells in other devices.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLi-ion cell compatible\u003c\/strong\u003e — holds standard rechargeable lithium cells (check variant for cell size compatibility: 18650, 21700, etc.)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB output\u003c\/strong\u003e — charges phones, earbuds, and other USB devices from the installed cells\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in protection circuit\u003c\/strong\u003e — over-discharge protection prevents cells from being drained below safe voltage levels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaceable cells\u003c\/strong\u003e — swap in fresh cells when depleted rather than discarding the entire unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact housing\u003c\/strong\u003e — lightweight case keeps cells organized and protected\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED indicator\u003c\/strong\u003e — shows power output status\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWho It’s For\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFlashlight and electronics hobbyists who stock rechargeable cells and want a dual-purpose power bank\u003c\/li\u003e\n\u003cli\u003eDIY enthusiasts who want a customizable, refillable portable charger\u003c\/li\u003e\n\u003cli\u003ePreppers and off-grid users who want a power bank that can be refueled with spare cells\u003c\/li\u003e\n\u003cli\u003eAnyone who wants a sustainable alternative to disposable or non-replaceable power banks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eInsert fully charged Li-ion cells into the case, observing correct polarity (+ and − markings).\u003c\/li\u003e\n\u003cli\u003eClose the case and connect your device to the USB output port.\u003c\/li\u003e\n\u003cli\u003eThe LED indicator will confirm power output is active.\u003c\/li\u003e\n\u003cli\u003eWhen cells are depleted, remove and recharge using a dedicated cell charger, then reinstall.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAre cells included?\u003c\/strong\u003e\u003cbr\u003eNo — cells are not included. Purchase quality cells from reputable brands (Samsung, LG, Panasonic, Sony) for best performance and safety.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat cell size does it accept?\u003c\/strong\u003e\u003cbr\u003eCheck the variant details for compatible cell sizes (18650, 21700, or other formats). Using the wrong cell size will prevent proper fit and function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I charge the cells while they’re in the case?\u003c\/strong\u003e\u003cbr\u003eThis depends on the specific model — some cases include a USB input for in-case charging, others require removing cells for charging in a dedicated charger. Check the variant details for charging method.\u003c\/p\u003e","brand":"Authority Asset Brand","offers":[{"title":"black","offer_id":48361212903668,"sku":"14:193","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0564\/6836\/files\/Sd15659b47d2a4dfaaf95c1cbc7609bf96.webp?v=1780173877","url":"https:\/\/authorityassetbrand.com\/products\/li-ion-battery-case-adapter-for-makita-18v-dual-usb-ports-power-bank-phone-charger-led-working-light-converter-lamp-flashlight","provider":"Authority Asset Brand","version":"1.0","type":"link"}