@flashlight I may have overheated my brass TS10. The battery wrap shrank.
I used it continuously in candle mode @ high with the original silicone diffuser for a video shoot, and found the battery looking like that, opening the light right after stepdown (and almost burning my fingers).
Been looking for a primary source but the manual doesn’t specifically mention candle mode, only tactical strobe
And then other places people mention this also applies to candle mode (like this BLF post).