{"product_id":"4pcs-reliance-rs50-21700-5000mah-70a-battery-40-e2-84-83-low-temp-tabless-high-drain-cell-for-drone-power-tools-e-scooter","title":"4Pcs Reliance RS50 21700 5000mAh 70A Battery – -40℃ Low Temp Tabless High Drain Cell for Drone, Power Tools \u0026 E-Scooter","description":"\u003ch4\u003e\u003cspan class=\"\"\u003eDescription\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eDefy the cold with the Reliance RS50, a revolutionary 21700 cell that combines tabless high-drain technology with extreme low-temperature capability down to -40℃. This 4-pack delivers a massive 5000mAh capacity, a continuous 70A discharge, and a 120A pulse rating, making it the ultimate all-weather power solution for drones, heavy-duty power tools, e-scooters, and cold-climate operations. The ultra-low internal resistance of approximately 5mΩ ensures minimal voltage sag and rapid power delivery even in sub-zero conditions where conventional batteries fail. The flat top design fits all standard 21700 devices and simplifies spot-welding for custom battery packs. When your mission cannot be stopped by winter, the Reliance RS50 is your unstoppable power source.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e-40℃ Extreme Low Temperature Capability\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Engineered with advanced low-temperature electrolyte, the RS50 discharges reliably at -40℃ where standard lithium cells completely fail. Perfect for polar expeditions, high-altitude drones, and winter outdoor work.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e70A Continuous \/ 120A Pulse Discharge\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Delivers massive current for the most demanding applications. Handles power tool start-ups, e-scooter acceleration, and drone punch-outs with ease, even in freezing temperatures.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e5000mAh High Capacity\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Industry-leading energy density for a high-drain low-temp cell. Enjoy extended runtime and flight time compared to standard 4000mAh cells.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eTabless (All-Tab) Technology\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Reduces internal resistance to ~5mΩ. Minimizes heat generation, maximizes power delivery, and maintains voltage stability under extreme loads.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFlat Top Design\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Universally compatible with 21700 spring-contact chargers, battery trays, and flashlights. Ideal for spot-welding nickel strips in custom battery packs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e4-Pack Convenience\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e – Perfect for building a cold-weather drone pack, equipping winter tools, or powering a compact e-scooter battery module.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eParameters\u003c\/span\u003e\u003c\/h4\u003e\n\u003cdiv class=\"ds-scroll-area ds-scroll-area--show-on-focus-within ds-scroll-area--enabled _1210dd7 c03cafe9\"\u003e\n\u003cdiv class=\"ds-scroll-area__gutters\"\u003e\n\u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eParameter\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003cbr\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eModel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eReliance RS50 (21700)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eTechnology\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eTabless (All-Tab) + Low-Temperature Electrolyte\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eTypical Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e5000 mAh (0.2C discharge to 2.5V at 25°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMinimum Capacity\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e~4800 mAh\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eNominal Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e3.6 V (typical operating 3.7 V)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Continuous Discharge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e70 A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (at 25°C; derate to ~40A for prolonged -40℃ use)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Pulse Discharge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e120 A\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (short burst \u0026lt;5 sec, monitor temperature)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eLow-Temperature Discharge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e-40℃ operable\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (capacity and voltage may be reduced; typical 60-70% capacity retention at -40℃)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDischarge Cut-off Voltage\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e2.5 V (do not over-discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eStandard Charge\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCC-CV, 0.5C (2500 mA) to 4.2 V, cut-off 50 mA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eMax Charge Current\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e1C (5000 mA) at 10-45°C\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCritical Charging Note\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003eCharge only above 0°C.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e Charging below freezing causes permanent damage.\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eInternal Resistance\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≤ 8 mΩ (typical ~5 mΩ, AC 1 kHz at 25°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCycle Life\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e≥ 500 cycles (to 80% capacity, 0.5C charge \/ 1C discharge at 25°C)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eOperating Temperature (Discharge)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e-40°C to 60°C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e (ensure active cooling for sustained 70A at room temp)\u003c\/span\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eStorage Temperature\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e-20°C to 25°C recommended; store at 3.6-3.7V for long-term\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eTop Type\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eFlat Top\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eDimensions\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 21.2 mm diameter × 70.3 mm length\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eWeight (single cell)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eApprox. 69 g\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003ePackage Includes\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e4 × Reliance RS50 21700 cells in protective packaging\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003cbr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eApplications\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRecommended For\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePolar \u0026amp; High-Altitude Drones \/ FPV\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Maintain stable flight power at -40℃ where standard LiPo and Li-ion packs fail. 5000mAh extends mission duration in cold weather surveillance and research.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCold-Climate Power Tools\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Angle grinders, impact wrenches, and drills used in winter construction, mountain rescue, or arctic fieldwork operate without battery failure.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWinter E-Scooters \u0026amp; Snow Vehicles\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Overcome the severe range loss that conventional batteries suffer in freezing temperatures.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003ePolar Research \u0026amp; Cold-Region Monitoring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Unattended weather stations, wildlife cameras, and scientific instruments that must operate reliably through extreme winters.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWinter Search \u0026amp; Rescue Lights\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: High-output flashlights and searchlights that cannot afford battery failure during critical mountain rescue operations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCold Storage \u0026amp; Cold Chain Logistics\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Handheld terminals, scanners, and equipment used in -18℃ to -40℃ freezer environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCompetition Vaping \u0026amp; RC Racing (Cold Weather)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Maintain peak power delivery during outdoor winter competitions and training sessions.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNot Recommended For\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eIndoor Low-Power Devices (room temperature)\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: The extreme low-temp capability is unnecessary and adds cost. Use a standard high-capacity cell like the Samsung 50G.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eStandard USB Power Banks\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: Severe performance overkill.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e18650-Only Devices\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: This is a 21700 cell and will not physically fit.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003e\u003cspan class=\"\"\u003eFAQ\u003c\/span\u003e\u003c\/h4\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Can this battery really work at -40℃? How does the performance compare to room temperature?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Yes. The RS50 is specifically engineered with a low-temperature electrolyte that enables discharge at -40℃. At this extreme temperature, you can expect approximately 60-70% of the room temperature capacity and a slightly lower voltage under load. For best results at -40℃, we recommend limiting continuous current to around 40A to maximize runtime and minimize voltage sag.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Can I charge this battery in freezing temperatures?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: No. \u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNever charge a lithium-ion battery below 0℃.\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e The RS50 can discharge at -40℃, but charging must always be done above 0℃ (ideally 10-25℃). Charging below freezing causes irreversible lithium plating, permanently damaging the cell and creating a safety hazard. If the battery has been used in the cold, allow it to warm up to room temperature before charging.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: How does the RS50 compare to standard high-drain 21700 cells?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: The RS50 matches or exceeds the performance of top-tier tabless cells like the EVE 40PL or Ampace JP40 in terms of current delivery (70A continuous, 120A pulse) and capacity (5000mAh), while adding the unique -40℃ low-temperature capability that no standard cell can match. It is essentially a premium all-weather upgrade.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Is this battery suitable for my FPV drone?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: Absolutely. For winter FPV flying or high-altitude missions, the RS50 is a game-changer. It provides the high burst current needed for punch-outs and acrobatics, the 5000mAh capacity for extended flight time, and reliable operation in freezing conditions that would ground standard packs.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eQ: Do I need a special charger?\u003c\/span\u003e\u003c\/strong\u003e\n\u003cbr\u003e\u003cspan class=\"\"\u003eA: No special charger is required. Use any quality CC-CV lithium-ion charger compatible with 21700 cells. The critical rule is to always ensure the battery temperature is above 0℃ before initiating a charge cycle.\u003c\/span\u003e\u003c\/p\u003e","brand":"Reliance","offers":[{"title":"Default Title","offer_id":51454195040502,"sku":"OAS910","price":32.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0819\/2753\/6886\/files\/ampace-jp40-21700-4000mah-60a-battery-front-1_f838cd21-2f44-4244-99c2-e429e645d541.webp?v=1786967336","url":"https:\/\/oneandes.com\/products\/4pcs-reliance-rs50-21700-5000mah-70a-battery-40-e2-84-83-low-temp-tabless-high-drain-cell-for-drone-power-tools-e-scooter","provider":"OneAndes","version":"1.0","type":"link"}