Will the Convoy button top converter limit performance of high drain batteries?

LED Flashlights – General Info
1

I want to order some BAK 45Ds from Nkon for my HaikeLite HK08 (which uses button top batteries). Will the resistance in these coverters reduce the performance noticeably? Also, is this the right listing: PCB board spacer for battery, for series connection, increase the length to fill the gap - Convoy flashlight ?

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2

I’ve got a few of those, their solid metal buttons. Should be no loss in current.

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