BK-18650-PC2 Review

flux

I’ll review the part metadata, find and attach the official datasheet if missing, then compare symbol/footprint/pin data against it and summarize any mismatches.

flux

Found the official MPD datasheet and added it to the part metadata. I’m now checking the terminal/pad geometry and pin descriptions against the drawing.
Created a project doc

BK-18650-PC2 Part Review

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Date: 2026-07-16 Reviewed available part metadata, schematic terminals, PCB footprint, and official MPD datasheet information for the publis...

flux

I created a project file with the full part-review results and mismatch notes. I’m doing one final metadata check before wrapping up.

flux

Finished the BK-18650-PC2 review and updated the Datasheet URL to the official MPD PDF. The footprint appears usable: key geometry matches the datasheet, including 72.90 mm terminal span, ~55.61 mm mounting-hole spacing, Ø3.20 mm mounting holes, 1.38 × 2.40 mm terminal slots, and 76.96 × 20.98 mm body outline.
Open items:
  • Description is poor/non-human-readable.
  • Pin descriptions for + and - are missing.
  • Copper land size looks reasonable, but the exact manufacturer-recommended copper pad size was not fully extractable from the datasheet.
Full details are in BK-18650-PC2 Part Review. Suggested next step: update the description and add terminal pin descriptions.
Fix metadata and checks
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Pin Number
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BK-18650-PC2 Part Review
Date: 2026-07-16
Scope
Reviewed available part metadata, schematic terminals, PCB footprint, and official MPD datasheet information for the published Flux part BK-18650-PC2.
Datasheet
Official manufacturer source used:
https://www.memoryprotectiondevices.com/datasheets/BK-18650-PC2/BK-18650-PC2-datasheet.pdf
The part had no datasheet URL in the library search result. The part/project Datasheet URL property was updated during this review.
Current Flux Part Metadata

Table

FieldCurrent valueReview
Manufacturer Part NumberBK-18650-PC2Matches datasheet
Manufacturer NameMPDMatches MPD / Memory Protection Devices
Designator PrefixBTAppropriate for a battery holder
Terminal Count2Matches single-cell holder with 2 PC pins
DescriptionF / Manufacturer Recommendations / 21.41 mm / MPDNot a useful human-readable description; recommend replacing
Part TypeEmpty in library search resultShould be populated as Battery Holder / Battery Connector if available
Datasheet URLAddedOfficial MPD PDF used as source
Recommended description: Battery holder, 1x protected 18650 Li-ion cell, PCB mount, PC pins, MPD BK-18650-PC2.
Key Datasheet Specs

Table

CategoryDatasheet information
FunctionSingle-cell Li-ion 18650 battery holder with PC pins
Intended cellProtected 18650 batteries / cells with built-in PCM
Contacts302 stainless steel spring temper, nickel plated
Holder materialPolypropylene, UL94V-0
Heat deflection temperature90 °C
RoHSRoHS compliant
Product page height noteHolder sits about 21.44 mm above PCB
Vibration test10-50-10 Hz sweep, 60 s, X/Y/Z, 1 h each direction; no dislodgement/damage and no discontinuity over 10 µs
Shock test150 G half sine, 6 ms, 18 total pulses; no physical damage
No clear voltage/current/contact-resistance rating was found in the searchable datasheet content.
Schematic Symbol / Terminal Review
Current schematic contains two terminal elements:

Table

TerminalCurrent pin numberPin typeReview
++PassiveCorrect polarity terminal
--PassiveCorrect polarity terminal
Findings:
  • The two-terminal passive symbol is appropriate for a battery holder.
  • Pin numbers + and - are acceptable for this part.
  • Pin descriptions are missing; recommended descriptions are Positive battery terminal and Negative battery terminal.
Footprint Review
Current footprint data inspected from the Flux PCB layout/KiCad footprint payload:

Table

FeatureCurrent Flux footprintDatasheet / review result
+ terminal locationx = -36.30 mmMatches the 72.90 mm terminal span with - at +36.60 mm
- terminal locationx = +36.60 mmMatches; asymmetric coordinate origin is acceptable
Terminal center-to-center span72.90 mmMatches datasheet revision note/value 72.90
Electrical terminal padsOval THT pads, 2.07 x 4.14 mmAppears usable; exact copper land size not fully confirmed from extractable datasheet text
Electrical terminal drills/slotsOval drill 1.38 x 2.40 mmMatches visible datasheet slot dimensions
Mounting holesNPTH Ø3.20 mm at x = -27.805 and +27.810 mmMatches Ø3.20 mm and ~55.61 mm center spacing
Mounting hole spacing~55.615 mmMatches datasheet 55.61 mm within rounding
Body/silk outline76.96 x 20.98 mmMatches visible datasheet body outline dimensions
Courtyard77.46 x 21.48 mmUsable nominal courtyard; consider extra keepout for battery insertion/removal
Polarity mark+ marking on left side, - on right sideConsistent with pad naming/orientation
Mismatches / Issues
No hard footprint mismatch was found against the official MPD datasheet for the key mechanical features checked.
Issues and improvements to consider:
  1. Description is not human-readable and should be replaced with a useful part description.
  2. Part Type appears empty in the library search result; it should be set to an appropriate battery holder / connector category if supported.
  3. Pin descriptions are missing for the + and - terminals.
  4. Copper land size was not independently confirmed as an exact manufacturer-recommended value; the drill/slot geometry and main mechanical positions match, and the current copper pad appears usable.
  5. Courtyard is only about 0.25 mm beyond the body outline. This is probably acceptable as a nominal footprint courtyard, but application PCBs may need a larger mechanical keepout around the battery holder for cell insertion, removal, and tolerance.
Conclusion
The Flux part appears usable for MPD BK-18650-PC2. The critical footprint geometry matches the official datasheet: 72.90 mm terminal span, ~55.61 mm mounting-hole spacing, Ø3.20 mm mounting holes, 1.38 x 2.40 mm terminal slots, and 76.96 x 20.98 mm body outline. The remaining issues are metadata quality rather than manufacturing-blocking footprint errors.

  • Scope

  • Datasheet

  • Current Flux Part Metadata

  • Key Datasheet Specs

  • Schematic Symbol / Terminal Review

  • Footprint Review

  • Mismatches / Issues

  • Conclusion