Hey "Note 6" never existed, they jumped straight from Note 5 to Note 7. I agree with Note 4 having battery draining issues, I have the international Exynos version Note 4 since mid-2015, still fully working, but I went through 6 batteries already. It's a fantastic fully featured phone with a great camera, but way too slow compared to 2020 flagship or mid-range level. I recommend ZeroLemon batteries for the Note 4. Also Anker were OK but it seems they aren't available anymore.
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