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Teardown
Tobias Lindqvist
@tobias-cells
Bought at retail · surveyed Jun 25, 2026
- Empirical teardown analysis
Is this worth building, and what does one unit cost in parts?
- Parts cost
- $29 – $38
- Parts
- 91
- Difficulty
- Advanced
Balancing topology, the MOSFET selection nobody explains, and a measured comparison of the protection thresholds against what the datasheet claims.
389 comments
5,471 likes
2,104 savesWhat you may do with this
No licence and no authorization. The survey is the publisher's own measurement of hardware they bought, and any patent or trade-dress question in your manufacturing jurisdiction is still yours to answer.
What the methods prove
Empirical teardown analysis
The unit disassembled and recorded part by part.
Everything published here is the publisher’s own measurement of a legally acquired, off-the-shelf commercial unit. Qatoto does not host manufacturer-internal documents and makes no clearance assessment of its own.
Report an IP concern about this teardown
Publisher attested on Jun 30, 2026 that the unit was lawfully obtained, that the data was gathered by measurement and standard disassembly, and that no vendor-confidential material was used.
Who is already selling and building this
On the Qatoto store, Battery management modules
- 8S 60 A BMS with CAN busStore Demo Furnishings · $6,200
- 16S 100 A battery management moduleStore Demo Furnishings · $8,900
Listings and builds are the only demand evidence on this page. Views, likes and saves are attention, and attention is not a market.
- Difficulty
- Advanced
- CAD format
- Altium / STEP
- Bill of materials
- $29 – $38
- Parts
- 91
Materials and composition
Every designation below carries how the publisher arrived at it. A material named from a datasheet or a supplier is not the same claim as one measured off this unit.
PVC, 105 °C
Cell-tap harness insulation · Polymer
Read off the part's own marking
Walkthrough
Documents
Balancing and protection schematic
Schematic · 1.1 KB · 2 pages
Bill of materials
Bill of materials · 758 B · 1 page
Getting it made
Qatoto lists factories by capability and certification and carries an inquiry to them. Nothing here is a quote, and a factory will ask for your own files.
Browse the factory directory- batteries
- bms
- safety
- power-electronics
Discussion
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Published · 62,192 views