{"title":"40A BMS","description":"\u003ch2\u003e40A Smart BMS — Light Load Protection for E-Bikes, Scooters \u0026amp; Portable Power\u003c\/h2\u003e\u003cp\u003eThe JKBMS 40A BMS series covers light-load applications across multiple voltage platforms — from compact e-bike battery packs and electric scooters to portable power stations and RV auxiliary batteries. Standard version includes Bluetooth, UART, and LCD display interface; optional CAN, RS485, heating, alarm, parallel, and ACC detection available.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCompatible chemistries: LiFePO4 \/ Li-ion \/ LTO\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eAvailable Models \u0026amp; Cell Configurations\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eBalance Current\u003c\/th\u003e\n\u003cth\u003eLi-ion (Ternary)\u003c\/th\u003e\n\u003cth\u003eLiFePO4 (Iron)\u003c\/th\u003e\n\u003cth\u003eLTO (Titanate)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJK-BD4A8S4P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003ctd\u003e3S – 8S\u003c\/td\u003e\n\u003ctd\u003e3S – 8S\u003c\/td\u003e\n\u003ctd\u003e7S – 8S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJK-BD4A17S4P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003ctd\u003e7S – 17S\u003c\/td\u003e\n\u003ctd\u003e8S – 17S\u003c\/td\u003e\n\u003ctd\u003e14S – 17S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJK-BD4A20S4P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003ctd\u003e7S – 20S\u003c\/td\u003e\n\u003ctd\u003e8S – 20S\u003c\/td\u003e\n\u003ctd\u003e14S – 20S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJK-BD4A24S4P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003ctd\u003e7S – 24S\u003c\/td\u003e\n\u003ctd\u003e8S – 24S\u003c\/td\u003e\n\u003ctd\u003e14S – 24S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJK-BD6A20S4P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.6A\u003c\/td\u003e\n\u003ctd\u003e7S – 20S\u003c\/td\u003e\n\u003ctd\u003e8S – 20S\u003c\/td\u003e\n\u003ctd\u003e14S – 20S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJK-BD6A24S4P\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.6A\u003c\/td\u003e\n\u003ctd\u003e7S – 24S\u003c\/td\u003e\n\u003ctd\u003e8S – 24S\u003c\/td\u003e\n\u003ctd\u003e14S – 24S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cem\u003eProtection current: 40A (4P)\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eE-bikes \u0026amp; electric scooters\u003c\/strong\u003e (24V–72V, light load)\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eElectric skateboards \u0026amp; personal mobility\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eRV auxiliary batteries\u003c\/strong\u003e and marine electronics\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003ePortable power stations\u003c\/strong\u003e and camping power\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eSolar street light batteries\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eSmall UPS \u0026amp; backup power systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e📖 \u003cstrong\u003eNot sure which BMS to choose?\u003c\/strong\u003e \u003ca href=\"\/pages\/bms-selection-guide\"\u003eView our BMS Selection Guide →\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"jkbms-smart-bms-4s-8s-40a-0-4a-active-balance-built-in-bluetooth-with-rs485-pcb-battery-protection-board-li-ion-lifepo4-lto-battery-pack-jk-bd4a8s4p","title":"JKBMS JK-BD4A8S4P | 40A BMS for RV, Marine \u0026 Portable Power | 3S-8S LiFePO4 Li-ion | Bluetooth + Optional RS485\/CAN","description":"\u003ch2\u003eCompact \u0026amp; Lightweight for Mobile Power — JKBMS JK-BD4A8S4P 40A Smart BMS for 3S–8S\u003c\/h2\u003e\n\n\u003cp\u003eThe JK-BD4A8S4P is a compact 40A BMS for LiFePO4, Li-ion, and LTO battery packs — designed for RV auxiliary batteries, marine electronics, portable power stations, and light backup power applications where size and weight matter. Bluetooth monitoring is built in; RS485 and CAN are available as optional add-ons.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible chemistries: LiFePO4 \/ Li-ion \/ LTO\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eJK-BD4A8S4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Configuration\u003c\/td\u003e\n\u003ctd\u003e3S–8S (LiFePO4 \/ Li-ion) · 7S–8S (LTO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current\u003c\/td\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Balance Current\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Communication\u003c\/td\u003e\n\u003ctd\u003eBluetooth + UART (LCD display port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Add-ons\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4, Li-ion, LTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-charge, Over-discharge, Over-current, Short-circuit, Over\/Under-temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: LTO (Lithium Titanate) cells require a minimum of 7S configuration.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eVoltage Platform \u0026amp; Load Class — Where This BMS Fits\u003c\/h2\u003e\n\n\u003ch3\u003e📊 3S–8S (LiFePO4 \/ Li-ion) — Light Load Applications\u003c\/h3\u003e\n\u003cp\u003eThe 3S–8S platform covers RV auxiliary batteries, marine electronics, portable power stations, and light backup power systems. At 40A, this BMS is sized for light-load applications — powering lighting, small appliances, and electronics rather than high-draw inverters or motors.\u003c\/p\u003e\n\n\u003ch3\u003e🔋 7S–8S (LTO) — Lithium Titanate Configuration\u003c\/h3\u003e\n\u003cp\u003eFor LTO chemistry, this BMS supports 7S–8S configurations, offering superior cycle life and low-temperature performance for demanding environments.\u003c\/p\u003e\n\n\u003ch3\u003e⚡ 0.4A Active Balancing — Cell Health for Light-Duty Packs\u003c\/h3\u003e\n\u003cp\u003eActive balancing continuously transfers energy between cells, keeping your pack balanced through every cycle — more usable capacity and longer pack life compared to passive alternatives.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWho Is This BMS For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🛥 \u003cstrong\u003eRV auxiliary battery systems\u003c\/strong\u003e (light load)\u003c\/li\u003e\n\u003cli\u003e⛵ \u003cstrong\u003eMarine electronics battery banks\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e🔦 \u003cstrong\u003ePortable power stations\u003c\/strong\u003e and camping power\u003c\/li\u003e\n\u003cli\u003e🔋 \u003cstrong\u003eLight backup power systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eOEM manufacturers\u003c\/strong\u003e of compact 40A lithium battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCustom Configuration Available\u003c\/h2\u003e\n\u003cp\u003eAll JKBMS products support feature customization for OEM orders — including communication interfaces, protection thresholds, balance parameters, and hardware configuration. \u003cstrong\u003e📩 \u003ca href=\"\/pages\/contact\"\u003eContact us\u003c\/a\u003e to discuss your custom requirements.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eOEM \/ ODM \u0026amp; Bulk Orders\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e📩 For wholesale pricing, MOQ, and custom configurations, please \u003ca href=\"\/pages\/contact\"\u003econtact us\u003c\/a\u003e directly.\u003c\/strong\u003e\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"JK-BD4A8S4P","offer_id":47769218842762,"sku":"JK-BD4A8S4P","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/BD4A8S4P_b8ab8a1f-92e8-446d-94cb-5d1e383ea52b.jpg?v=1775496330"},{"product_id":"jkbms-smart-bms-8s-17s-40a-0-4a-active-balance-built-in-bluetooth-with-rs485-pcb-battery-protection-board-li-ion-lifepo4-lto-lithium-battery-pack-jk-bd4a17s4p","title":"JKBMS JK-BD4A17S4P | 40A Compact BMS 8S-17S | LiFePO4 Li-ion LTO | 0.4A Active Balance + Bluetooth + UART","description":"\u003ch2\u003eMid-Voltage Compact Protection — JKBMS JK-BD4A17S4P 40A Smart BMS for 8S–17S\u003c\/h2\u003e\n\n\u003cp\u003eThe JK-BD4A17S4P is a compact 40A BMS covering the 8S–17S voltage range (24V–51V) — designed for e-bike battery packs, light electric scooters, and small backup power systems in the light-load category. Bluetooth and UART for LCD display monitoring are built in; RS485 and CAN are available as optional add-ons.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible chemistries: LiFePO4 \/ Li-ion \/ LTO\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eJK-BD4A17S4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Configuration\u003c\/td\u003e\n\u003ctd\u003e8S – 17S (24V – 51V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current\u003c\/td\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Balance Current\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Communication\u003c\/td\u003e\n\u003ctd\u003eBluetooth + UART (LCD display port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Add-ons\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4, Li-ion, LTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-charge, Over-discharge, Over-current, Short-circuit, Over\/Under-temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eVoltage Platform \u0026amp; Load Class — Where This BMS Fits\u003c\/h2\u003e\n\n\u003ch3\u003e📊 8S–17S (24V–51V) — Light Load, Mid-Voltage\u003c\/h3\u003e\n\u003cp\u003eThe 8S–17S range covers e-bike battery packs (36V–48V) and light electric scooters in the light-load category. At 40A, this BMS is sized for commuter and recreational applications — not high-draw motors or inverters, but reliable protection and active balancing for everyday cycling use.\u003c\/p\u003e\n\n\u003ch3\u003e⚡ 0.4A Active Balancing — Cell Health for Every Cycle\u003c\/h3\u003e\n\u003cp\u003eActive balancing continuously transfers energy between cells, keeping your pack balanced and efficient through every charge\/discharge cycle.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWho Is This BMS For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🚲 \u003cstrong\u003eE-bike battery packs\u003c\/strong\u003e (36V–48V, light load)\u003c\/li\u003e\n\u003cli\u003e🛴 \u003cstrong\u003eLight electric scooters\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e🔋 \u003cstrong\u003eSmall backup power systems\u003c\/strong\u003e (24V–51V)\u003c\/li\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eOEM manufacturers\u003c\/strong\u003e of 24V–51V 40A compact lithium battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCustom Configuration Available\u003c\/h2\u003e\n\u003cp\u003eAll JKBMS products support feature customization for OEM orders — including communication interfaces, protection thresholds, balance parameters, and hardware configuration. \u003cstrong\u003e📩 \u003ca href=\"\/pages\/contact\"\u003eContact us\u003c\/a\u003e to discuss your custom requirements.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eOEM \/ ODM \u0026amp; Bulk Orders\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e📩 For wholesale pricing, MOQ, and custom configurations, please \u003ca href=\"\/pages\/contact\"\u003econtact us\u003c\/a\u003e directly.\u003c\/strong\u003e\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"JK-BD4A17S4P","offer_id":47769218908298,"sku":"JK-BD4A17S4P","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/BD4A17S4P_849a55b8-4a95-4a45-9a06-f67953897a6e.jpg?v=1775496330"},{"product_id":"jkbms-smart-bms-8s-20s-40a-0-4a-active-balance-built-in-bluetooth-with-rs485-pcb-battery-protection-board-li-ion-lifepo4-lto-lithium-battery-pack-jk-bd4a20s4p","title":"JKBMS JK-BD4A20S4P | 40A BMS for E-Scooter \u0026 60V Backup Power | 8S-20S LiFePO4 Li-ion | 0.4A Active Balance + Bluetooth + UART","description":"\u003ch2\u003eLight Load at 60V — JKBMS JK-BD4A20S4P 40A Smart BMS for 8S–20S\u003c\/h2\u003e\n\n\u003cp\u003eThe JK-BD4A20S4P covers the 8S–20S voltage range (24V–60V) at 40A continuous current — designed for electric scooters, light e-bikes, and small backup power systems running at 48V–60V. Bluetooth and UART for LCD display monitoring are built in; RS485 and CAN are available as optional add-ons.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible chemistries: LiFePO4 \/ Li-ion \/ LTO\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eJK-BD4A20S4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Configuration\u003c\/td\u003e\n\u003ctd\u003e8S – 20S (24V – 60V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current\u003c\/td\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Balance Current\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Communication\u003c\/td\u003e\n\u003ctd\u003eBluetooth + UART (LCD display port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Add-ons\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4, Li-ion, LTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-charge, Over-discharge, Over-current, Short-circuit, Over\/Under-temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eVoltage Platform \u0026amp; Load Class — Where This BMS Fits\u003c\/h2\u003e\n\n\u003ch3\u003e📊 8S–20S (24V–60V) — Light Load Applications\u003c\/h3\u003e\n\u003cp\u003eThe 8S–20S platform covers electric scooters and light e-bikes (48V–60V) in the light-load category. At 40A, this BMS is sized for commuter and recreational applications — reliable protection and active balancing for everyday use without the overhead of high-current designs.\u003c\/p\u003e\n\n\u003ch3\u003e⚡ 0.4A Active Balancing — Cell Health for Every Cycle\u003c\/h3\u003e\n\u003cp\u003eActive balancing continuously transfers energy between cells, keeping your pack balanced and efficient through every charge\/discharge cycle.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWho Is This BMS For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🛴 \u003cstrong\u003eElectric scooters\u003c\/strong\u003e (48V–60V, light load)\u003c\/li\u003e\n\u003cli\u003e🚲 \u003cstrong\u003eLight e-bikes\u003c\/strong\u003e running at higher voltages\u003c\/li\u003e\n\u003cli\u003e🔋 \u003cstrong\u003eSmall backup power systems\u003c\/strong\u003e (24V–60V)\u003c\/li\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eOEM manufacturers\u003c\/strong\u003e of 24V–60V 40A compact lithium battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCustom Configuration Available\u003c\/h2\u003e\n\u003cp\u003eAll JKBMS products support feature customization for OEM orders — including communication interfaces, protection thresholds, balance parameters, and hardware configuration. \u003cstrong\u003e📩 \u003ca href=\"\/pages\/contact\"\u003eContact us\u003c\/a\u003e to discuss your custom requirements.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eOEM \/ ODM \u0026amp; Bulk Orders\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e📩 For wholesale pricing, MOQ, and custom configurations, please \u003ca href=\"\/pages\/contact\"\u003econtact us\u003c\/a\u003e directly.\u003c\/strong\u003e\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"JK-BD4A20S4P","offer_id":47769218973834,"sku":"JK-BD4A20S4P","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/BD4A20S4P_f46b7dd8-62ad-413a-abac-32a4a6a30f81.jpg?v=1775496330"},{"product_id":"jkbms-smart-bms-8s-24s-40a-0-4a-active-balance-built-in-bluetooth-with-rs485-pcb-battery-protection-board-li-ion-lifepo4-lto-lithium-battery-pack-jk-bd4a24s4p","title":"JKBMS JK-BD4A24S4P | 40A BMS for E-Bike \u0026 72V Backup Power | 8S-24S LiFePO4 Li-ion | 0.4A Active Balance + Bluetooth + UART","description":"\u003ch2\u003eLight Load Across the Full Voltage Range — JKBMS JK-BD4A24S4P 40A Smart BMS for 8S–24S\u003c\/h2\u003e\n\n\u003cp\u003eThe JK-BD4A24S4P covers the full 8S–24S voltage range (24V–72V) at 40A continuous current — designed for e-bikes, electric skateboards, and small backup power systems running up to 72V. Bluetooth and UART for LCD display monitoring are built in; RS485 and CAN are available as optional add-ons.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible chemistries: LiFePO4 \/ Li-ion \/ LTO\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eJK-BD4A24S4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell Configuration\u003c\/td\u003e\n\u003ctd\u003e8S – 24S (24V – 72V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous Current\u003c\/td\u003e\n\u003ctd\u003e40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActive Balance Current\u003c\/td\u003e\n\u003ctd\u003e0.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Communication\u003c\/td\u003e\n\u003ctd\u003eBluetooth + UART (LCD display port)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Add-ons\u003c\/td\u003e\n\u003ctd\u003eRS485 \/ CAN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Chemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4, Li-ion, LTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eOver-charge, Over-discharge, Over-current, Short-circuit, Over\/Under-temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eVoltage Platform \u0026amp; Load Class — Where This BMS Fits\u003c\/h2\u003e\n\n\u003ch3\u003e📊 8S–24S (24V–72V) — Light Load, Wide Voltage Coverage\u003c\/h3\u003e\n\u003cp\u003eThe 8S–24S range covers e-bikes and electric skateboards (36V–72V) in the light-load category. At 40A, this BMS is sized for commuter and recreational applications — the widest voltage coverage in the BD4 series, suitable for high-voltage light-load builds up to 72V.\u003c\/p\u003e\n\n\u003ch3\u003e⚡ 0.4A Active Balancing — Cell Health for Every Cycle\u003c\/h3\u003e\n\u003cp\u003eActive balancing continuously transfers energy between cells, keeping your pack balanced and efficient through every charge\/discharge cycle.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWho Is This BMS For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e🚲 \u003cstrong\u003eE-bikes\u003c\/strong\u003e (48V–72V, light load)\u003c\/li\u003e\n\u003cli\u003e🛹 \u003cstrong\u003eElectric skateboards \u0026amp; personal mobility\u003c\/strong\u003e (up to 72V)\u003c\/li\u003e\n\u003cli\u003e🔋 \u003cstrong\u003eSmall backup power systems\u003c\/strong\u003e (24V–72V)\u003c\/li\u003e\n\u003cli\u003e🏭 \u003cstrong\u003eOEM manufacturers\u003c\/strong\u003e of 24V–72V 40A compact lithium battery packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCustom Configuration Available\u003c\/h2\u003e\n\u003cp\u003eAll JKBMS products support feature customization for OEM orders — including communication interfaces, protection thresholds, balance parameters, and hardware configuration. \u003cstrong\u003e📩 \u003ca href=\"\/pages\/contact\"\u003eContact us\u003c\/a\u003e to discuss your custom requirements.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eOEM \/ ODM \u0026amp; Bulk Orders\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e📩 For wholesale pricing, MOQ, and custom configurations, please \u003ca href=\"\/pages\/contact\"\u003econtact us\u003c\/a\u003e directly.\u003c\/strong\u003e\u003c\/p\u003e","brand":"JKBMS","offers":[{"title":"JK-BD4A24S4P","offer_id":47769219039370,"sku":"JK-BD4A24S4P","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/0591\/1434\/files\/BD4A24S4P_08819a4a-58c6-4c67-ac13-03cc253a07a6.jpg?v=1775496330"}],"url":"https:\/\/jkbms-ess.com\/collections\/40a-bms.oembed","provider":"JKBMS-ESS","version":"1.0","type":"link"}