# Help fixing schematics error on 18650 battery pack

**URL:** <https://forum.fritzing.org/t/help-fixing-schematics-error-on-18650-battery-pack/17771>\
**Category:** parts help\
**Created:** [December 30, 2022, 3:41pm UTC](https://forum.fritzing.org/t/help-fixing-schematics-error-on-18650-battery-pack/17771 "2022-12-30T15:41:58Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![vanepp](https://forum.fritzing.org/user_avatar/forum.fritzing.org/vanepp/32/4426_2.png) [@vanepp](https://forum.fritzing.org/u/vanepp)\
**Post date:** [December 30, 2022, 9:35pm UTC](https://forum.fritzing.org/t/help-fixing-schematics-error-on-18650-battery-pack/17771/3 "2022-12-30T21:35:00Z")

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All of @just_randy 's parts look to be incorrect (plus is swapped with - between views.) The desirable solution is for @just_randy to correct them and replace the parts in the post with correct ones. Until that happens, here is a corrected version of the 2 cell version you were asking about and what needs to be done to correct it. This tutorial should give you everything that I am doing here, but part creation in general is quite complex (more so in this case because at least one of the parts has bendable legs which is among the most difficult to deal with!)

> [@Part creation howto part 1 breadboard and pcb](https://forum.fritzing.org/t/part-creation-howto-part-1-breadboard-and-pcb/7692):
>
> Someone in this forum post requested help to fix up a part. So while doing that I decided to record what I needed to do in order to fix the part to provide a tutorial to create new / fix broken parts. If you start from the Tarjeta S4A EDU.fzpz file posted in the above thread, you should be able to recreate my improved part posted in the same thread. I started by loading the original part in to Fritzing, that indicates breadboard is (at first look anyway) pretty good, but schematic and pcb are…

Breadboard looks to be correct:

 ![capture](https://forum.fritzing.org/uploads/default/original/2X/c/cfa788fef8fe5513aa6481e5eade4b781f5af6f7.jpeg)

here hovering over the - pin shows the pin is labeled as pin1 (connector0) and as the negative side of the battery. In schematic the svg is reversed:

 ![capture1](https://forum.fritzing.org/uploads/default/original/2X/d/d28e0a249f0f7109f6dda40dcfcbb23136f158ba.jpeg)

here the negative pin is showing as pin2 (connector1) the positive terminal instead of pin1 (connector0) the negative terminal. That is because the pins are reversed in the schematic svg (displayed here in Inkscape)

 ![capture2](https://forum.fritzing.org/uploads/default/original/2X/0/068052829bec438e15fe2ac58f394e2b334eeabc.jpeg)

to fix that we need to modify the schematic svg to correct the pin number like this:

 ![capture3](https://forum.fritzing.org/uploads/default/original/2X/2/28490c2e60661ffd3cfa6f42b8eaad14397a6d07.jpeg)

where I swapped connector0 for connector1 and changed the pin labels so pin 1 is the negative and pin 2 is the positive. Save this as a plain svg, then rebuild the part and run it through FritzingCheckPart.py to clean it up and remove the px from font sizes and we have a new corrected part.

[2x\_18650-fixed.fzpz](https://forum.fritzing.org/uploads/short-url/o5KFbM99LKJNRzxgT4977oEmdMw.fzpz) (11.4 KB)

note you will need to delete the current part from the mine parts bin and restart Fritzing before you will be able to load the fixed part because I didn’t change the moduleId or file names. Hope this helps!

Peter

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