{"product_id":"vapcell-k40-21700-4000mah-30a-45a-flat-top-rechargeable-battery","title":"Vapcell K40 21700 4000mAh 30A\/45A Flat Top Rechargeable Battery","description":"\u003cp\u003eThe Vapcell K40 is a high-drain 21700 built for lights that pull real current. It delivers a rated 4000mAh with a 30A continuous discharge rating and a 45A maximum (temperature-limited to 80°C), putting it in the same class as the Samsung 40T. If your flashlight's turbo mode sags or steps down early on a high-capacity cell, this is the fix.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e21700 flat top, unprotected INR lithium-ion, brown wrap\u003c\/li\u003e\n\u003cli\u003e4000mAh typical \/ 3900mAh minimum (0.2C)\u003c\/li\u003e\n\u003cli\u003e30A continuous, 45A max discharge (80°C cut-off)\u003c\/li\u003e\n\u003cli\u003e3.6V nominal, 4.20V full charge, 2.5V cut-off\u003c\/li\u003e\n\u003cli\u003eApprox. 10mΩ internal resistance (AC 1kHz)\u003c\/li\u003e\n\u003cli\u003eStandard charge 2A, quick charge up to 6A\u003c\/li\u003e\n\u003cli\u003eApprox. 21.1 × 70.6mm, 68g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIndependent testing:\u003c\/strong\u003e Battery Mooch's bench test rated the K40 at its full 4000mAh and 30A, calling it \"about equal to the Samsung 40T\". HKJ (lygte-info.dk) found the two test cells tracked well together and called them \"good high current cells with a decent capacity\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFit check:\u003c\/strong\u003e Flat top and unprotected. Confirm your light accepts a flat-top 21700 (most Convoy, Emisar, Sofirn and Wurkkos 21700 hosts do). Devices that need a button top or a protected cell should look at a different SKU.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's included:\u003c\/strong\u003e 1 × Vapcell K40 21700 4000mAh 30A\/45A Flat Top Rechargeable Battery. Ships from Pennsylvania.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eUnprotected lithium-ion cell. Use only in devices with their own protection circuitry, charge with a quality Li-ion charger, never exceed the continuous discharge rating, and keep the wrap and top insulator ring in perfect condition. Not for use in devices that require a button-top or protected cell.\u003c\/em\u003e\u003c\/p\u003e","brand":"Vapcell","offers":[{"title":"Default Title","offer_id":51657860383035,"sku":null,"price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0721\/6034\/6427\/files\/ABUIABACGAAgt7mCqgYokMiC5QIwoAY4oAY.jpg?v=1788630774","url":"https:\/\/www.gadgetconnections.com\/products\/vapcell-k40-21700-4000mah-30a-45a-flat-top-rechargeable-battery","provider":"GadgetConnections","version":"1.0","type":"link"}