{"product_id":"speras-lth35-18650-battery-3500mah-usb-c-40-c-resistant","title":"SPERAS LTH35 Low Temperature High Performance 18650 Lithium Battery 3500mAh","description":"\u003cdiv style=\"font-family: 'Inter', -apple-system, BlinkMacSystemFont, Arial, sans-serif; color: #1e293b; line-height: 1.6; max-width: 950px; margin: 0 auto;\"\u003e\n\u003cdiv style=\"background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); padding: 40px 25px; border-radius: 12px; margin-bottom: 30px; text-align: center; box-shadow: 0 10px 30px rgba(0,0,0,0.15); border-bottom: 5px solid #f59e0b;\"\u003e\n\u003cspan style=\"display: inline-block; background: #f59e0b; color: #111; padding: 6px 16px; border-radius: 20px; font-size: 14px; font-weight: 900; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 15px;\"\u003ePremium Power Supply\u003c\/span\u003e\n\u003ch1 style=\"font-size: 32px; font-weight: 900; margin: 0 0 20px 0; line-height: 1.3; color: #ffffff !important;\"\u003eSPERAS LTH35: 3500mAh High Capacity 18650 Rechargeable Li-ion Battery\u003c\/h1\u003e\n\u003cp style=\"font-size: 17px; color: #cbd5e1 !important; max-width: 750px; margin: 0 auto;\"\u003eDesigned for use in freezing conditions, the SPERAS LTH35 battery is threefold more effective than standard 18650 cells at \u003cstrong\u003e-40°C (-40°F)\u003c\/strong\u003e. Featuring a substantial 3500mAh capacity and a built-in USB-C port, it is the ultimate energy supply for demanding tactical and outdoor applications.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: center; margin-bottom: 40px;\"\u003e\u003cimg style=\"max-width: 100%; border-radius: 12px; box-shadow: 0 8px 25px rgba(0,0,0,0.08);\" alt=\"SPERAS LTH35 18650 Rechargeable Li-ion Battery with Type-C\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0605\/4549\/9313\/files\/SPERAS3500mAhHighCapacity186503.6VRechargeableLi-ionBattery.jpg?v=1751298673\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 20px; margin-bottom: 40px;\"\u003e\n\u003cdiv style=\"flex: 1 1 280px; background: #f8fafc; padding: 25px; border-radius: 12px; border: 1px solid #e2e8f0; text-align: center;\"\u003e\n\u003ch3 style=\"font-size: 20px; font-weight: 800; color: #0f172a; margin-top: 0;\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e❄️ -40°C Cold Resistant\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; color: #475569;\"\u003eStandard batteries die quickly in the cold. The LTH35 is engineered to maintain stable voltage and reliable output even in extreme freezing temperatures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 280px; background: #f8fafc; padding: 25px; border-radius: 12px; border: 1px solid #e2e8f0; text-align: center;\"\u003e\n\u003ch3 style=\"font-size: 20px; font-weight: 800; color: #0f172a; margin-top: 0;\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e🔌 Direct USB-C Charging\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; color: #475569;\"\u003eNo dedicated battery charger needed. Plug a standard USB-C cable directly into the battery for fast, 1A convenient charging anywhere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 280px; background: #f8fafc; padding: 25px; border-radius: 12px; border: 1px solid #e2e8f0; text-align: center;\"\u003e\n\u003ch3 style=\"font-size: 20px; font-weight: 800; color: #0f172a; margin-top: 0;\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e⚡ 10A Max Output\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp style=\"font-size: 15px; color: #475569;\"\u003eSupports a massive 10A maximum discharge current, providing stable and relentless power to high-lumen tactical flashlights without voltage sag.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 26px; font-weight: 900; color: #0f172a; border-left: 5px solid #f59e0b; padding-left: 15px; margin-bottom: 20px;\"\u003eMaximize Your Gear with the SPERAS Rechargeable Li-ion Battery\u003c\/h2\u003e\n\u003cdiv style=\"background: #fff; padding: 25px; border-radius: 12px; border: 1px solid #e2e8f0; margin-bottom: 40px; box-shadow: 0 4px 10px rgba(0,0,0,0.03);\"\u003e\n\u003cp style=\"font-size: 16px; color: #475569; margin-top: 0;\"\u003eThe LTH35 is designed to flawlessly power high-drain devices. It is the perfect, factory-recommended upgrade and replacement battery for the following premium SPERAS flashlight models:\u003c\/p\u003e\n\u003cul style=\"font-size: 16px; font-weight: bold; line-height: 2.0;\"\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003ca href=\"https:\/\/sperasflashlight.com\/products\/speras-est-1900lm-211m-usb-c-rechargeable-tactical-flashlight\" target=\"_blank\" title=\"SPERAS EST 1900lm 211m USB-C Rechargeable Tactical Flashlight\" style=\"color: rgb(43, 0, 255); text-decoration: underline;\" rel=\"noopener\"\u003eSPERAS EST\u003c\/a\u003e  \u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca style=\"color: rgb(43, 0, 255); text-decoration: underline;\" href=\"https:\/\/sperasflashlight.com\/products\/speras-est2-1900lm-211m-usb-c-rechargeable-tactical-flashlight\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/sperasflashlight.com\/products\/speras-est2-1900lm-211m-usb-c-rechargeable-tactical-flashlight\" target=\"_blank\" title=\"SPERAS EST2 1900lm 211m USB-C Rechargeable Tactical Flashlight\" style=\"color: rgb(43, 0, 255); text-decoration: underline;\" rel=\"noopener\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003eSPERAS EST2  USB-C Rechargeable Tactical Flashlight\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca style=\"color: rgb(43, 0, 255); text-decoration: underline;\" href=\"https:\/\/sperasflashlight.com\/products\/speras-est-plus-1600lm-726m-professional-tactical-police-flashlight\" target=\"_blank\"\u003eSPERAS EST PLUS V2 Professional Search Light \u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca style=\"color: rgb(43, 0, 255); text-decoration: underline;\" href=\"https:\/\/sperasflashlight.com\/products\/speras-m4-mini-type-c-flashlight-1320lm-652m-powered-by-1-pce-18350-battery\" target=\"_blank\"\u003eSSPERAS M4 Type-C Rechargeable EDC Flashlight \u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/sperasflashlight.com\/products\/speras-sh18-versatile-headlamp-with-white-light-and-red-light\" target=\"_blank\" title=\" SPERAS SH18 2000lm Right-Angle Flashlight \u0026amp; Headlamp | 250m Throw\" style=\"color: rgb(43, 0, 255);\" rel=\"noopener\"\u003eSPERAS SH18 2000lm Right-Angle Flashlight \u0026amp; Headlamp \u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 26px; font-weight: 900; color: #0f172a; border-left: 5px solid #f59e0b; padding-left: 15px; margin-bottom: 20px;\"\u003eHow the SPERAS LTH35 Stacks Up\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; color: #475569; margin-bottom: 20px;\"\u003eWhy settle for generic batteries when your safety and visibility are on the line? See how the SPERAS LTH35 compares against industry standards.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; border-radius: 10px; box-shadow: 0 4px 15px rgba(0,0,0,0.08); border: 1px solid #cbd5e1; margin-bottom: 50px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; background: #fff !important; text-align: center; min-width: 600px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 16px; background: #1e293b !important; color: #ffffff !important; width: 25%; font-size: 16px; border-right: 1px solid #334155;\"\u003eKey Specification\u003c\/th\u003e\n\u003cth style=\"padding: 16px; background: #f59e0b !important; color: #111111 !important; width: 25%; font-size: 18px; font-weight: 900; border-right: 1px solid #d97706;\"\u003eSPERAS LTH35\u003c\/th\u003e\n\u003cth style=\"padding: 16px; background: #94a3b8 !important; color: #ffffff !important; width: 25%; font-size: 16px; border-right: 1px solid #cbd5e1;\"\u003eGeneric 18650\u003c\/th\u003e\n\u003cth style=\"padding: 16px; background: #94a3b8 !important; color: #ffffff !important; width: 25%; font-size: 16px;\"\u003eOther Premium Brands (Nitecore\/Fenix)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 14px; font-weight: bold; color: #334155; background: #f8fafc; border-right: 1px solid #e2e8f0;\"\u003eCapacity\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #b45309; font-weight: 900; background: #fffbeb; border-right: 1px solid #e2e8f0;\"\u003e3500mAh (True Capacity)\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #f1f5f9; border-right: 1px solid #e2e8f0;\"\u003eTypically 2600 - 3000mAh\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #f1f5f9;\"\u003e3400 - 3500mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 14px; font-weight: bold; color: #334155; background: #ffffff; border-right: 1px solid #e2e8f0;\"\u003eCold Resistance\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #b45309; font-weight: 900; background: #ffffff; border-right: 1px solid #e2e8f0;\"\u003eExtreme (-40°C \/ -40°F)\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #ffffff; border-right: 1px solid #e2e8f0;\"\u003ePoor (-10°C limit)\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #ffffff;\"\u003eStandard (-20°C limit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 14px; font-weight: bold; color: #334155; background: #f8fafc; border-right: 1px solid #e2e8f0;\"\u003eDirect USB-C Charging\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #b45309; font-weight: 900; background: #fffbeb; border-right: 1px solid #e2e8f0;\"\u003e✅ Yes Built-in\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #f1f5f9; border-right: 1px solid #e2e8f0;\"\u003e❌ No\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #f1f5f9;\"\u003eVaries (Often Micro-USB or None)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 14px; font-weight: bold; color: #334155; background: #ffffff; border-right: 1px solid #e2e8f0;\"\u003ePrice Tier\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #b45309; font-weight: 900; background: #ffffff; border-right: 1px solid #e2e8f0;\"\u003eHigh Value\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #ffffff; border-right: 1px solid #e2e8f0;\"\u003eCheap\u003c\/td\u003e\n\u003ctd style=\"padding: 14px; color: #475569; background: #ffffff;\"\u003ePremium Pricing ($20+)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 26px; font-weight: 900; color: rgb(15, 23, 42); border-left: 5px solid rgb(245, 158, 11); margin-bottom: 20px; text-align: center;\"\u003e  OUR Speras LTH35 Technical Specifications\u003c\/h2\u003e\n\u003cdiv style=\"border: 1px solid #e2e8f0; border-radius: 8px; overflow: hidden; margin-bottom: 50px; box-shadow: 0 4px 6px rgba(0,0,0,0.02);\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; text-align: left;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f8fafc; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b; width: 40%;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003eLTH35\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eBattery Type\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003e3.6V 18650 Lithium-ion Battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eBattery Capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003e3500mAh \/ 12.6Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eInput Charging\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #ea580c; font-weight: bold;\"\u003e1A \/ USB-C Direct Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eContinuous Output Current\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003e5A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eMax Output Current\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003e10A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eWorking Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #ea580c; font-weight: bold;\"\u003e-40°C ~ 60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003eLength: 69.43mm | Diameter: 18.4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f8fafc; border-bottom: 1px solid #e2e8f0;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eNet Weight\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003e50g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #ffffff;\"\u003e\n\u003ctd style=\"padding: 12px 15px; font-weight: bold; color: #1e293b;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 12px 15px; color: #475569;\"\u003e1 Year (Contact us for fast exchange\/replacement)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch2 style=\"font-size: 26px; font-weight: 900; color: #0f172a; border-left: 5px solid #f59e0b; padding-left: 15px; margin-bottom: 25px;\"\u003eFrequently Asked Questions (FAQ)\u003c\/h2\u003e\n\u003cdiv style=\"margin-bottom: 50px;\"\u003e\n\u003cdetails style=\"background: #fff; padding: 20px; margin-bottom: 15px; border-radius: 8px; border: 1px solid #cbd5e1; cursor: pointer;\" open=\"\"\u003e\n\u003csummary style=\"font-size: 18px; font-weight: 800; color: #1e293b; outline: none;\"\u003eDo I need an external battery charger to charge the LTH35?\u003c\/summary\u003e\n\u003cp style=\"margin-top: 15px; font-size: 16px; color: #475569; line-height: 1.6;\"\u003eNo! One of the best features of the SPERAS LTH35 Rechargeable Li-ion Battery is its built-in USB-C port. You can plug a standard Type-C cable directly into the side of the battery to charge it, making it perfect for travel and camping.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"background: #fff; padding: 20px; margin-bottom: 15px; border-radius: 8px; border: 1px solid #cbd5e1; cursor: pointer;\" open=\"\"\u003e\n\u003csummary style=\"font-size: 18px; font-weight: 800; color: #1e293b; outline: none;\"\u003eWhy is the -40°C cold resistance important?\u003c\/summary\u003e\n\u003cp style=\"margin-top: 15px; font-size: 16px; color: #475569; line-height: 1.6;\"\u003eStandard lithium-ion batteries lose a massive amount of their capacity and discharge capability when temperatures drop below freezing, often dying completely. The SPERAS LTH35 is engineered with specialized chemistry to maintain stable voltage down to -40°C, ensuring your flashlight works when you need it most in winter conditions.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"background: #fff; padding: 20px; margin-bottom: 15px; border-radius: 8px; border: 1px solid #cbd5e1; cursor: pointer;\" open=\"\"\u003e\n\u003csummary style=\"font-size: 18px; font-weight: 800; color: #1e293b; outline: none;\"\u003eCan I use this 18650 battery in non-SPERAS flashlights?\u003c\/summary\u003e\n\u003cp style=\"margin-top: 15px; font-size: 16px; color: #475569; line-height: 1.6;\"\u003eYes. As long as your device accepts standard \"button-top\" 18650 batteries and supports a 69.4mm length (which accounts for the built-in protection and USB-C circuitry), the SPERAS LTH35 will provide exceptional high-drain performance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n    {\n      \"@context\": \"https:\/\/schema.org\",\n      \"@type\": \"FAQPage\",\n      \"mainEntity\": [{\n        \"@type\": \"Question\",\n        \"name\": \"Do I need an external battery charger to charge the LTH35?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"No! The SPERAS LTH35 Rechargeable Li-ion Battery has a built-in USB-C port, allowing you to charge it directly with a standard Type-C cable without needing an external charger.\"\n        }\n      },{\n        \"@type\": \"Question\",\n        \"name\": \"Why is the -40°C cold resistance important?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Standard lithium-ion batteries lose capacity rapidly in freezing temperatures. The SPERAS LTH35 is engineered to maintain stable voltage and output even at -40°C, ensuring reliable performance in harsh winter conditions.\"\n        }\n      },{\n        \"@type\": \"Question\",\n        \"name\": \"Can I use this 18650 battery in non-SPERAS flashlights?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. As long as the device accepts a standard button-top 18650 battery and accommodates the 69.4mm length, the SPERAS LTH35 will work flawlessly.\"\n        }\n      }]\n    }\n    \u003c\/script\u003e\n\u003c\/div\u003e","brand":"SPERAS","offers":[{"title":"LTH35 3500mAh 18650 3.6V Li-ion Battery","offer_id":45816102158513,"sku":null,"price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0605\/4549\/9313\/files\/SPERAS3500mAhHighCapacity186503.6VRechargeableLi-ionBattery.jpg?v=1751298673","url":"https:\/\/sperasflashlight.com\/products\/speras-lth35-18650-battery-3500mah-usb-c-40-c-resistant","provider":"Speras Light","version":"1.0","type":"link"}