{"product_id":"8-4v-2a-charger-2s-7-4v-lithium-battery-pack","title":"8.4V 2A Charger for 2S 7.4V Li-ion Battery Packs – 5.5×2.1mm","description":"\u003ch2\u003e8.4V 2A Charger for 2S 7.4V Lithium-Ion Battery Packs\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCharge compatible 2S lithium-ion and lithium-polymer battery packs with an 8.4V charging voltage and DC 5.5 × 2.1 mm connector.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis charger is designed for 2-series lithium battery packs with a nominal voltage of 7.4V and a fully charged voltage of 8.4V. It can be used with compatible battery packs assembled from 18650 or 21700 lithium-ion cells.\u003c\/p\u003e\n\n\u003cp\u003eCommon compatible applications may include DIY 2S battery packs, portable electronics, LED bicycle-light battery packs, hobby projects, and other equipment that uses a compatible 7.4V lithium battery pack.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Compatibility requires the correct battery chemistry, pack voltage, charging current, connector size, and polarity. Please compare the specifications of your original charger and battery before use.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCharger output voltage: 8.4V DC\u003c\/li\u003e\n  \u003cli\u003eMaximum charging current: 2A\u003c\/li\u003e\n  \u003cli\u003eCompatible battery configuration: 2S\u003c\/li\u003e\n  \u003cli\u003eCompatible nominal battery voltage: 7.4V\u003c\/li\u003e\n  \u003cli\u003eCompatible fully charged voltage: 8.4V\u003c\/li\u003e\n  \u003cli\u003eConnector size: DC 5.5 × 2.1 mm barrel plug\u003c\/li\u003e\n  \u003cli\u003eDesigned for lithium-ion and compatible lithium-polymer battery packs\u003c\/li\u003e\n  \u003cli\u003eSuitable for compatible 18650 and 21700 cell-based battery packs\u003c\/li\u003e\n  \u003cli\u003eUS wall plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2S 7.4V lithium-ion battery packs\u003c\/li\u003e\n  \u003cli\u003eDIY 18650 battery packs\u003c\/li\u003e\n  \u003cli\u003eDIY 21700 battery packs\u003c\/li\u003e\n  \u003cli\u003eCompatible LED bicycle-light battery packs\u003c\/li\u003e\n  \u003cli\u003ePortable electronics and lighting projects\u003c\/li\u003e\n  \u003cli\u003eHobby and custom battery-powered equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility Requirements\u003c\/h3\u003e\n\n\u003cp\u003eBefore ordering, confirm that your battery or original charger requires all of the following:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2S lithium-ion or lithium-polymer battery chemistry\u003c\/li\u003e\n  \u003cli\u003e7.4V nominal battery voltage\u003c\/li\u003e\n  \u003cli\u003e8.4V charging voltage\u003c\/li\u003e\n  \u003cli\u003eUp to 2A charging current\u003c\/li\u003e\n  \u003cli\u003eDC 5.5 × 2.1 mm barrel connector\u003c\/li\u003e\n  \u003cli\u003eMatching connector polarity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe battery pack should contain a properly installed and functioning battery management system, or BMS, designed for 2S lithium-ion charging.\u003c\/p\u003e\n\n\u003ch3\u003eNot Compatible With\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSingle-cell 3.7V or 4.2V lithium batteries\u003c\/li\u003e\n  \u003cli\u003e3S, 4S, or higher-voltage lithium battery packs\u003c\/li\u003e\n  \u003cli\u003e12V lead-acid batteries\u003c\/li\u003e\n  \u003cli\u003eNiMH or NiCd battery packs\u003c\/li\u003e\n  \u003cli\u003eLiFePO4 battery packs requiring a different charging voltage\u003c\/li\u003e\n  \u003cli\u003eDevices with a different connector size or polarity\u003c\/li\u003e\n  \u003cli\u003eBattery packs that cannot safely accept a 2A charging current\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is Included\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eOne 8.4V 2A lithium battery charger with US wall plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is Not Included\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eLithium battery pack\u003c\/li\u003e\n  \u003cli\u003e18650 or 21700 battery cells\u003c\/li\u003e\n  \u003cli\u003eConnector adapters\u003c\/li\u003e\n  \u003cli\u003eOther accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety Information\u003c\/h3\u003e\n\n\u003cp\u003eUse this charger only with a compatible, properly assembled 2S lithium battery pack. Do not use it with damaged, swollen, overheated, leaking, improperly wired, or unprotected battery packs.\u003c\/p\u003e\n\n\u003cp\u003eCharge lithium batteries on a nonflammable surface and do not leave them unattended while charging. Disconnect the charger if the battery or charger becomes unusually hot, emits an odor, changes shape, or behaves abnormally.\u003c\/p\u003e\n\n\u003ch3\u003eAdditional Parts and Resources\u003c\/h3\u003e\n\n\u003cp\u003eFor battery-building components, BMS boards, connectors, holders, conductive materials, and related supplies, visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor helpful battery tools, calculators, technical information, and additional resources, download the \u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47800218255587,"sku":"CHG-2S-84V-2A-5521","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_1c5efe19-e35e-474e-975f-bb9fa0d02507.jpg?v=1767748974","url":"https:\/\/renewspark.com\/products\/8-4v-2a-charger-2s-7-4v-lithium-battery-pack","provider":"RenewSpark","version":"1.0","type":"link"}