1s to 2s lipo inside product.

[Twinstaged]

I’ve been lurking around here for years.  First post.  Thanks for any comments/criticisms.

Designing a re placement rear cover for a product that increases battery life and is rechargeable.  The cover holds 2 UN certified “protected” 1s 2000mah lipo packs.  They plug into a series harness that leads to a balance 2s 15w charger.  From the charger is a standard 9 volt clip that leaves the case.  Does this now create an issue with the UN38.3 cert?  I’ve heard mixed opinions.  Pictures shows 1 of the prototypes.

[quince]

You'll need to remember that your customers are always welcome to sue you if it burns down their property or injures anyone.

[Twinstaged]

Yep absolutely lol.  That same liability has not stopped companies from selling products.  They follow the same rules that I am trying to follow.

[Twinstaged]

So I’ve been doing some more research on this.  The seperate cells/modules have passed the required tests.  If I can verify that my assembly cannot overcharge, short circuit, or over discharge the batteries then everything should be fine with the original 38.3.  If I can’t verify that then the new assembly would need re tested under 38.3.3.1.

Any experts on the matter?