Manufacturer and seller images. Configuration examples may include additional equipment.
Image source: JK-BD4A8S4P board, top view, from Jikong's own store page for this modelNo sellers found.
Printed as "JK-BD4A8S4P" in the title of Jikong's own store page; Jikong's specification prints the same model as "JK-BD4A8S-4P". The Amazon listing was only a lead.
Official product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product title
Documented
Converted: 180 g / 1000 g per kg = 0.18 kg
Printed as "成品重量 (Finished weight) 180 g" in the basic parameter table.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Converted
The specification's adaptation guide prints 3-8 strings (7-8 for LTO), while the store page prints "Series 4-8S". The specification's range is recorded first.
Printed in the product adaptation guide for the JK-BD4A8S-4P/6P as 3～8 strings for ternary lithium and lithium iron batteries and 7～8 for lithium titanate batteries.
Printed as "Series 4-8S" in the store page's additional information table.
Official product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9
Documented
Printed as "保护板尺寸 (Protective plate size) 121.5*93*17.6 mm" in the basic parameter table and as 121.5mm×93mm×17.6mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Basic parameter table, PDF page 17; section 5.3, PDF page 25
Calculated
Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "UART接口 (UART interface) 标配", "CAN 选配 (Optional)", "RS485 选配 (Optional)" and "显示屏接口 (Display interface) 标配". The store page prints "Communication Bluetooth, Display".
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product function configuration table, section 2.1, PDF page 8; store page additional information table
Documented
Printed as "加热功能 (Heating function) 选配 (Optional)" in the function configuration table and "designed heating current is 4A" in section 3.3.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Product function configuration table, section 2.1; section 3.3, Heating function
Documented
Printed on the cover as "Lithium battery active balancing protection board".
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Cover
Documented
Printed as "最大均衡电流 (Maximum balancing current) 0.4 A" in the 40 A board's basic parameter table; the store page prints "Balance Current 0.4A".
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Printed as "最大充电电流 (Maximum charging current) 40 A" in the 40 A board's basic parameter table.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Converted: 180 g / 1000 g per kg = 0.18 kg
Printed as "成品重量 (Finished weight) 180 g" in the basic parameter table.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Converted
The specification's adaptation guide prints 3-8 strings (7-8 for LTO), while the store page prints "Series 4-8S". The specification's range is recorded first.
Printed in the product adaptation guide for the JK-BD4A8S-4P/6P as 3～8 strings for ternary lithium and lithium iron batteries and 7～8 for lithium titanate batteries.
Printed as "Series 4-8S" in the store page's additional information table.
Official product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9
Documented
Printed as "保护板尺寸 (Protective plate size) 121.5*93*17.6 mm" in the basic parameter table and as 121.5mm×93mm×17.6mm in section 5.3; the figures are not labeled by axis, so they are stored in the order printed.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Basic parameter table, PDF page 17; section 5.3, PDF page 25
Documented
Printed in the function configuration table as "蓝牙功能 (Bluetooth function) 标配 (Standard option)", "UART接口 (UART interface) 标配", "CAN 选配 (Optional)", "RS485 选配 (Optional)" and "显示屏接口 (Display interface) 标配". The store page prints "Communication Bluetooth, Display".
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Product function configuration table, section 2.1, PDF page 8; store page additional information table
Documented
Printed as "加热功能 (Heating function) 选配 (Optional)" in the function configuration table and "designed heating current is 4A" in section 3.3.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Product function configuration table, section 2.1; section 3.3, Heating function
Documented
Printed on the cover as "Lithium battery active balancing protection board".
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Cover
Documented
Printed as "最大均衡电流 (Maximum balancing current) 0.4 A" in the 40 A board's basic parameter table; the store page prints "Balance Current 0.4A".
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Printed as "最大充电电流 (Maximum charging current) 40 A" in the 40 A board's basic parameter table.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Printed in the adaptation guide as "三元锂电池 (Ternary lithium battery)", "铁锂电池 (Lithium iron battery)" and "钛酸锂电池 (Lithium titanate battery)".
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Product adaptation guide, section 2.2, PDF page 9
Documented
Printed as "最大放电电流 (Maximum discharge current) 40 A" in the 40 A board's basic parameter table; the store page prints "Continuous Discharge 40A". No duration is printed.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentOfficial product page: Jikong Technology Official Store: JKBMS JK-BD4A8S4P Smart Active Balance BMS (October 21, 2026 capture) Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Printed as "工作温度 (Operating temperature) -30-70 ℃" in the basic parameter table.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentLocation: Basic parameter table, section 4.1, PDF page 17
Documented
Published claims and calculations, not independent test results.
Archived copy captured on 2026-10-21.
Location: Sections 2.1 to 2.3, 3.3, 4.1 and 5.3 (PDF pages 8, 9, 11, 17 and 25)
Retrieved
Jikong Technology's own bilingual (Chinese and English) specification for its JK-BD4A8S-4P (40 A) and JK-BD4A8S-6P (60 A) boards, version 15.3.2, downloaded from the Specifications list of jkbms.com's support page and linked from the JK-BD4A8S4P store page; captured October 21, 2026. Section 4.1 is the 40 A board's basic parameter table; section 4.2 (60 A) is not used. Manufacturer claims, not independent tests.
Archived copy of a document published by Chengdu Jikong Technology Co., Ltd. (JK BMS). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Chengdu Jikong Technology Co., Ltd. (JK BMS) published. Original address: https://www.jkbms.com/wp-content/uploads/2026/02/JK-BD4A8S-4P-JK-BD4A8S-6P-Product-specification.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: e0c3691e552e0b49e0ca3def66f5022cd793eaf3eb4332be0c80f0c41ccc578a
Archived copy captured on 2026-10-21.
Location: Product title, technical specifications list and additional information table
Retrieved
Jikong Technology's own product page for this model on its official store (shop.jkbms.com), captured October 21, 2026. A product page with marketing text, a short technical list and an additional-information table, not a datasheet; customer reviews on the page are not used.
Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.
Archived copy of a document published by Chengdu Jikong Technology Co., Ltd. (JK BMS). Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Chengdu Jikong Technology Co., Ltd. (JK BMS) published. Original address: https://www.jkbms.com/wp-content/uploads/2026/02/JK-BD4A8S-4P-JK-BD4A8S-6P-Product-specification.pdf. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: e0c3691e552e0b49e0ca3def66f5022cd793eaf3eb4332be0c80f0c41ccc578a
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Hyphenated form Jikong prints in its specification (sections 2.2 and 2.3, PDF page 9) for this model.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF page 9): the standard board with CAN communication added ("标配+CAN通信"). One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF page 9): the standard board with RS485 communication added ("标配+RS485通信"). One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF page 9): the standard board with heating added ("标配+加热"). One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF page 9): the standard board with heating and CAN communication added. One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF page 9): the standard board with heating and RS485 communication added. One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentFunction option of the same board in Jikong's function selection guide (sections 2.2 and 2.3, PDF page 9): the standard board with heating, CAN and RS485 communication added. One basic parameter table covers every option; not a separate product.
Official datasheet: JK-BD4A8S-4P / JK-BD4A8S-6P Product specification, Version 15.3.2 Rev 15.3.2 · Checked · Earlier documentManufacturer SKU JK-BD4A8S4P
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