（Can we consider the original UN Test done for a lithium ion single cell valid after an intermediary manufacturer adds a protection circuit to the cell?）
We are manufacturers of camcorder and we use a lithium ion single cell to which an intermediary processor adds a protection circuit to the original cell. Can we consider the original UN Test given to the original lithium ion cell valid for the final product which has a protection circuit added? Or, must we go through a new UN Test for the cell which has added a protection circuit? (30 Nov 12)
The original UN Test is no longer valid when you have altered the original cell.
In the three Packing Instructions (PI 965, PI 966 and PI967) assigned to lithium ion cells/batteries, there is a Note added to General Requirements sub-paragraph a) where the Note reads; “Batteries, including those which have been refurbished or otherwise altered, are subject to these tests irrespective of whether the cells of which they are composed have been so tested.”
Therefore the protection circuit added cell must undergo the UN Test.