I had been debating between column charge 4 and 3 for quite some time. I made the poor decision of opting for more. the burden is heavy and awkward to bear. While I didn't personally do the comparison, it seems that the audio quality is enhanced in Ch-4. I can't listen to music at a decent volume (60%) all day because the battery capacity is 7500 and the mobile phone only has 4100. The music's quality is excellent, in my opinion. I spent a thousand dollars on Ali for a silicone shell that was supposed to make the column shockproof and more comfortable to wear, but it just hangs there with no strap or way to secure it. but that's another tale entirely.
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