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JBD SP04S034 3S-4S Smart BMS with Bluetooth and UART

Model: SP04S034 · SKU: SP04S034

Prepared Nov 12, 2026

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Common specifications

Series cells	3-4SSource [1]
Battery chemistry	LiFePO4, Li-ionSource [1]
Continuous discharge current	Not documented
Continuous charge current	Not documented
Balance current	Not documented
Communications	Bluetooth; RS485; UARTSource [1]
Peak discharge current	Not documented
Balancing	Not documented
Heating output	Not documented
Weight	Not documented
Dimensions	232 D × 105 D × 20 D mm9.13 D × 4.13 D × 0.79 D in convertedSource [1]
Enclosure volume	0.49 L** Calculated from recorded external dimensions
Warranty term	Not documented

All recorded specifications

Battery chemistry	LiFePO4, Li-ionDocumented claim Conditions JBD sells LiFePO4 and Li-ion variants of this model; the details table is headed "BMS Lifepo4 Details". Location: Product page, variant list JBD sells LiFePO4 and Li-ion variants of this model; the details table is headed "BMS Lifepo4 Details". Location: Product page, variant list Official product page · JBD product page: JBD Smart BMS 3S 4S 100A-200A, model SP04S034 (October 15, 2026 capture) [1]
Communications	Bluetooth; RS485; UARTDocumented claim Conditions Printed as "Bluetooth/RS485/UART/Heating"; RS485 is offered in one variant (Balance+Bluetooth+UART+RS485+Heating) and the page says the UART/RS485 communication box is purchased separately. Location: Product page, Quick Details, Communication Protocol Printed as "Bluetooth/RS485/UART/Heating"; RS485 is offered in one variant (Balance+Bluetooth+UART+RS485+Heating) and the page says the UART/RS485 communication box is purchased separately. Location: Product page, Quick Details, Communication Protocol Official product page · JBD product page: JBD Smart BMS 3S 4S 100A-200A, model SP04S034 (October 15, 2026 capture) [1]
Dimensions	232 D × 105 D × 20 D mm9.13 D × 4.13 D × 0.79 D in convertedDocumented claim Conditions Printed as "23210520mm"; the axes are not named. Location: Product page, Quick Details, Product Size Printed as "23210520mm"; the axes are not named. Location: Product page, Quick Details, Product Size Official product page · JBD product page: JBD Smart BMS 3S 4S 100A-200A, model SP04S034 (October 15, 2026 capture) [1]
Operating temperature	-30 to 75 °C-22 to 167 °F convertedDocumented claim Conditions Printed as "-30 degree~75 degree". Location: Product page, BMS Lifepo4 Details, Working Temperature Printed as "-30 degree~75 degree". Location: Product page, BMS Lifepo4 Details, Working Temperature Official product page · JBD product page: JBD Smart BMS 3S 4S 100A-200A, model SP04S034 (October 15, 2026 capture) [1]
Operating voltage range	9.2 to 15 VDocumented claim Conditions Printed in the LiFePO4 details table, which also prints "Charge voltage(recommend) 14.4V". Location: Product page, BMS Lifepo4 Details, Working voltage range Printed in the LiFePO4 details table, which also prints "Charge voltage(recommend) 14.4V". Location: Product page, BMS Lifepo4 Details, Working voltage range Official product page · JBD product page: JBD Smart BMS 3S 4S 100A-200A, model SP04S034 (October 15, 2026 capture) [1]
Series cells	3-4SDocumented claim Conditions Printed as "String: 3-4S"; the variants are named "3S 4S". Location: Product page, Quick Details, String Printed as "String: 3-4S"; the variants are named "3S 4S". Location: Product page, Quick Details, String Official product page · JBD product page: JBD Smart BMS 3S 4S 100A-200A, model SP04S034 (October 15, 2026 capture) [1]

Warranty

Certificate records

No records documented.

Sources and revisions

JBD product page: JBD Smart BMS 3S 4S 100A-200A, model SP04S034 (October 15, 2026 capture)Official product page · Checked Oct 15, 2026https://jiabaida-bms.com/products/jbd-smart-bms-3s-4s-100a-120a-150a-200a-lithium-lion-battery-pcb-with-uart-heating-function-series-connection