{"product_id":"dongmagnetic-18650-power-battery-high-magnification-4000mah-10c-j-3-7v-4ah-rechargeable-lithium-battery-with-overcharge-protection-explosion-proof-valve-short-circuit-protection-overdischarge-protection","title":"Dongmagnetic 18650 Power Battery High Magnification 4000mAh 10C J 3.7V 4Ah Rechargeable Lithium Battery with Overcharge Protection Explosion-Proof Valve Short Circuit Protection Overdischarge Protection","description":"\u003ch1\u003eDongmagnetic 18650 Power Battery 4000mAh 10C High Discharge Lithium Cell\u003c\/h1\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Dongmagnetic 18650 power battery with 4000mAh capacity, 10C discharge, and built-in protection circuits\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5874\/2025-10-27\/original-image\/059ab0fa-e796-4478-bb47-6fe3a426da6f.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis Dongmagnetic 18650 battery is engineered for high-magnification applications, delivering a strong 10C discharge current alongside a generous 4000mAh capacity. Whether you need reliable power for RC vehicles, power tools, or portable electronics, this nickel cobalt manganese (NCM) ternary lithium cell is built to meet the demands of high-current devices. With multiple built-in protections, it offers a safer power solution without compromising on performance. Each battery is specified at a nominal voltage of 3.7V and a capacity of 4Ah, making it a practical choice for enthusiasts and professionals alike.\u003c\/p\u003e\u003ch2\u003eFeatures and Construction\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Dongmagnetic 18650 power battery with 4000mAh capacity, 10C discharge, and built-in protection circuits\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5874\/2025-10-27\/original-image\/0c8d2980-1986-418b-88e2-4b9740557542.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis cell combines a protective circuit system with a proven lithium chemistry to support both safety and performance in high-drain roles.\u003c\/p\u003e\u003ch3\u003eMaterial and Build\u003c\/h3\u003e\u003cp\u003eThe battery uses nickel cobalt manganese ternary lithium (NCM) chemistry, which provides a stable energy density and high discharge capability. A metal casing houses the cell, and an integrated explosion-proof valve adds a layer of safety. The unit includes overcharge, overdischarge, and short circuit protection to help prevent common electrical faults.\u003c\/p\u003e\u003ch3\u003eSize and Practical Fit\u003c\/h3\u003e\u003cp\u003eBuilt in the standard 18650 form factor (18mm diameter, 65mm length), this battery fits many devices and battery holders designed for cylindrical lithium-ion cells. The flat-top design suits soldered or spot-welded connections for custom battery packs.\u003c\/p\u003e\u003ch2\u003eUses and Placement\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Dongmagnetic 18650 power battery with 4000mAh capacity, 10C discharge, and built-in protection circuits\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5874\/2025-10-27\/original-image\/26bc65cb-14b4-4857-9285-36f685ab3108.webp\"\u003e\u003c\/div\u003e\u003cp\u003eDesigned for high-current applications, this battery is ideal for scenarios where a standard 18650 cell would be insufficient.\u003c\/p\u003e\u003ch3\u003eRC and Hobbyist Use\u003c\/h3\u003e\u003cp\u003eThe 10C discharge rating makes this cell a strong candidate for radio-controlled cars, drones, and planes that require bursts of high current. The 4000mAh capacity also supports longer run times between charges.\u003c\/p\u003e\u003ch3\u003ePower Tool Applications\u003c\/h3\u003e\u003cp\u003eCordless power tools such as drills, screwdrivers, and small saws benefit from the high current output and built-in protections. The battery can be integrated into custom packs or used in compatible single-cell tools.\u003c\/p\u003e\u003ch2\u003eBenefits and Buying Value\u003c\/h2\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Dongmagnetic 18650 power battery with 4000mAh capacity, 10C discharge, and built-in protection circuits\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5874\/2025-10-27\/original-image\/802a84e0-231a-422a-8c03-51be8a59fb1f.webp\"\u003e\u003c\/div\u003e\u003cp\u003eThis battery offers practical advantages for anyone who needs high performance from a standard-sized lithium cell.\u003c\/p\u003e\u003ch3\u003eReuse and Low Maintenance\u003c\/h3\u003e\u003cp\u003eAs a rechargeable lithium-ion battery, it can be reused hundreds of times with proper care. The integrated protection circuit helps extend service life by preventing overcharging and deep discharging.\u003c\/p\u003e\u003ch3\u003eWhy Choose This Product\u003c\/h3\u003e\u003cp\u003eWith a 10C discharge rate and 4000mAh capacity in a widespread 18650 form factor, this battery fills a specific need for high-drain applications. The inclusion of multiple protections and an explosion-proof valve adds peace of mind compared to unprotected cells.\u003c\/p\u003e\u003cdiv style=\"text-align: center;\"\u003e\u003cimg alt=\"Dongmagnetic 18650 power battery with 4000mAh capacity, 10C discharge, and built-in protection circuits\" src=\"https:\/\/images.seoo.uk\/src\/products\/shopify_export\/US10\/5874\/2025-10-27\/original-image\/a491ee6d-357d-4b2e-a4e7-b9e61b4e4483_trans.webp\"\u003e\u003c\/div\u003e","brand":"5ewxib-i4","offers":[{"title":"21700 4000mah 10C J \/ 3.7V \/ 4Ah","offer_id":55065956942161,"sku":"CJYD209954301AZ","price":13.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1040\/8548\/7953\/files\/26bc65cb-14b4-4857-9285-36f685ab3108.webp?v=1790245018","url":"https:\/\/avelmere.com\/products\/dongmagnetic-18650-power-battery-high-magnification-4000mah-10c-j-3-7v-4ah-rechargeable-lithium-battery-with-overcharge-protection-explosion-proof-valve-short-circuit-protection-overdischarge-protection","provider":"Avelmere.com","version":"1.0","type":"link"}