Hello,
honestly I've only used NiMH batteries in my SB-800 and while they have gotten slightly warm, I've never had the warmth problem that you have. I haven't ever used an external battery pack with them, but when using all 5 batteries, I've never had this problme, hope this answers your question.
isaiah
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I know that I am one with beauty, And that my comrades are one. Let our souls be mountains, Let our spirtis be stars, Let our hearts be worlds.
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