Thingiverse
HP-41 Battery Replacement
by FMMT666
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A 3D printable HP-41 battery replacement.
You can stick in 4 sub AAA NiMH cells or go for the pro version, which powers a HP-41 from either
- 2 AAA NiMH cells or
- 1 old Li-Ion mobile phone battery, USB chargeable
http://www.askrprojects.net/hardware/hp41bat/index.html
You can stick in 4 sub AAA NiMH cells or go for the pro version, which powers a HP-41 from either
- 2 AAA NiMH cells or
- 1 old Li-Ion mobile phone battery, USB chargeable
http://www.askrprojects.net/hardware/hp41bat/index.html
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