{"product_id":"3-7v-500mah-li-ion-rc-battery-2-pack-with-usb-charger-reliable","title":"3.7V 500mAh Li-ion RC Battery 2-Pack with USB Charger - Reliable","description":"\u003cp\u003eIn this review the Blomiky 3.7V 500mAh Li-ion battery 2-pack is examined as a low-cost replacement for small RC cars, boats and stunt vehicles; the single biggest reason to buy is straightforward: these batteries deliver the correct 3.7V form factor, an SM-2P black 2-pin plug and a built-in USB charge cable with over-charge protection so users can replace worn cells and get back on the track quickly. The reviewer tested fit, charging behaviour and day-to-day usability to see whether these spare batteries are a practical swap for common 1\/18 and similar small-scale RC models.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal capacity:\u003c\/strong\u003e The batteries report a real capacity range of 500mAh to 800mAh which provides usable runtime for many small RC cars and boats before needing a recharge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard connector:\u003c\/strong\u003e The SM-2P black 2-pin plug with a roughly 5.5 x 5.2mm cross-section matches many toy-grade RC wiring harnesses so installation is typically tool-free.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact size:\u003c\/strong\u003e At 51 x 18 x 14mm the battery fits into small chassis compartments designed for 1S 3.7V packs without major modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in USB charging:\u003c\/strong\u003e Each charge cable has an over-charge protection board and a charging indicator so users can plug into any USB port and safely charge the pack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight spare:\u003c\/strong\u003e Weighing about 19g per cell, these packs add minimal weight to small stunt cars and amphibious boats, preserving handling and performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThese batteries are best for hobbyists and casual owners of small remote control vehicles who need an inexpensive, ready-to-use spare that matches 3.7V 1S form factors and the SM-2P plug. They suit owners of 1\/18 and some 1\/16 scale stunt cars, small RC boats, amphibious stunt vehicles and toy-grade models from brands that use similar size and connector standards.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users of larger or professional RC models that require higher capacity or different connector types, and anyone who cannot confirm the exact voltage, plug type and physical dimensions of their original pack before buying.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eGood value 2-pack with two charge cables included, which makes replacing multiple batteries convenient.\u003c\/li\u003e\n\u003cli\u003eBuilt-in USB charger with an over-charge protection board stops charging near 4.2V and shows a red charge indicator light.\u003c\/li\u003e\n\u003cli\u003eCompact dimensions and light weight make them easy to fit into many small RC vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eQuality impressions vary slightly among users, so performance and longevity may differ between individual packs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery chemistry\u003c\/td\u003e\n\u003ctd\u003eLi-ion (1S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal voltage\u003c\/td\u003e\n\u003ctd\u003e3.7V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated capacity\u003c\/td\u003e\n\u003ctd\u003e500mAh (real 500mAh-800mAh)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eSM-2P black 2-pin (5.5 x 5.2mm cross-section)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e51 x 18 x 14mm (2.0 x 0.72 x 0.56 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e19g (0.66 oz) per battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003e2 batteries and 2 USB charge cables with over-charge protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Blomiky 3.7V 500mAh 2-pack is a practical, low-cost replacement for owners of small stunt cars and boats that use the SM-2P 1S battery format; it includes USB charge cables with over-charge protection and a clear charge indicator, making it an easy swap for hobbyists who need spares. For the price it delivers solid functionality and value, though buyers should confirm plug, voltage and size match their vehicle before ordering.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does a full charge take?\u003c\/strong\u003e\u003cbr\u003eCharging typically takes about 2-4 hours using the included USB charge cable depending on the power source.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these batteries fit my stunt car?\u003c\/strong\u003e\u003cbr\u003eThey fit many 1S small RC cars and boats that use a 3.7V pack and an SM-2P connector, but you must confirm the voltage, plug type and 51 x 18 x 14mm dimensions first.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the charger stop when full?\u003c\/strong\u003e\u003cbr\u003eYes, the built-in over-charge protection stops charging near 4.2V; the red indicator light turns off when fully charged or after reconnecting if it remains on.\u003c\/p\u003e","brand":"Blomiky","offers":[{"title":"Default Title","offer_id":46484772487387,"sku":"B08Q45XQKW","price":9.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71woRnINgRL._AC_SL1500.jpg?v=1739298036","url":"https:\/\/gearmusthave.com\/products\/3-7v-500mah-li-ion-rc-battery-2-pack-with-usb-charger-reliable","provider":"GearMustHave","version":"1.0","type":"link"}