{"product_id":"powertac-5000mah-21700-rechargeable-battery","title":"Powertac 5000mAh 21700 Rechargeable Li-ion Battery with PCB Protection","description":"\u003ch2\u003eMore Capacity. Longer Runtime. Same Powertac Quality.\u003c\/h2\u003e\u003cp\u003eThe Powertac 5000mAh 21700 Rechargeable Li-ion Battery delivers significantly more capacity than a standard 18650 — meaning longer runtime between charges on compatible flashlights. Built with internal PCB protection to prevent over-voltage, under-voltage, and short circuits, so your light and your battery stay protected.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The 21700 is physically larger than the 18650. It is NOT a drop-in replacement for 18650-compatible lights. Check your flashlight's compatibility before ordering.\u003c\/p\u003e\u003ch2\u003eCompatible With\u003c\/h2\u003e\u003cp\u003ePowertac flashlights and devices specifically designed for the 21700 battery format. If you're unsure, contact us before ordering.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 5000mAh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 3.6V nominal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormat:\u003c\/strong\u003e 21700 (larger than 18650 — not interchangeable)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCycle Life:\u003c\/strong\u003e 500+ cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Internal PCB (over-voltage, under-voltage, short circuit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard:\u003c\/strong\u003e Manufactured under ISO9001-2000, tested to IEC standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePCB Protection Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-voltage protection:\u003c\/strong\u003e Prevents overcharging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnder-voltage protection:\u003c\/strong\u003e Prevents deep discharge damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort circuit protection:\u003c\/strong\u003e Safeguards your flashlight's electronics.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eAuthorized Powertac dealer. Genuine battery backed by Powertac's limited 30-day warranty (receipt required).\u003c\/strong\u003e\u003c\/p\u003e","brand":"Powertac","offers":[{"title":"Default Title","offer_id":43155424739426,"sku":"21700","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/7726\/9858\/files\/5000bat.jpg?v=1786319017","url":"https:\/\/lumexflashlights.com\/products\/powertac-5000mah-21700-rechargeable-battery","provider":"Lumex Flashlights","version":"1.0","type":"link"}