Robisan, IMHO the size doesn’t matter in this particular case… I feel the drain with 1Gb, 2Gb, 4Gb and 16Gb SanDisk cards.
As I mentioned earlier I think that the drain happens due to the integration of a card in the player.
If I am right - wouldn’t it be reasonable to introduce in a future firmware (if any) a kind of function switching off seamless integration in MSC mode while using only FOLDER browsing to access the files? In case of folder browsing the seamless integration is not needed at all. It might improve the battery life.
For comparison I had a look at my 2-3 year old unbranded Chinese Rockchip-based mp3 player with an external card (it uses only folder browsing - which is very fine for me) and I can’t see any difference in the battery life - no matter if has a card inserted or not.
