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C40 LiFePo4 LFP 4s battery
IP Report
Print Profile(1)
0.24mm layer, 2 walls, 15% infill
Designer
19.3 h
4 plates
Open in Bambu Studio
Boost
16
35
4
1
35
16
Released
Bill of Materials
List other parts
- LFP cells - C40 ~20Ah x 4:
- Bus bars x 2:
- Midi fuse 20-40 amp x 1: Your choice of current capacity, but don't forget a fuse!!
- Appropriate BMS x 1: 4S LFP
- M6 ring terminals x 5:
- M3 heatset inserts x 3:
- M3 screws x 3: 10-15mm long, cap head
- 14 AWG silicone wire x 1:
- XT60 / Anderson Powerpole / other connector x 1:
- 0.1" / 2.54mm pitch, 5-way JST connector x 1: Optional, if you want external balance while charging
Description
This is a 4s LFP (LiFePo4) cell holder, to make a 12.8v (nominal) battery, from inexpensive C40 cylindrical cells.
The C40 cells are currently (early 2026) very cheap on sites like AliExpress. I bought B grade cells and mine came out about 17Ah, which is not bad for the price and size
License
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Creative Commons Attribution-Noncommercial-Share Alike
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