Buying a new pair of earbuds that connect wirelessly to your smartphone is a tricky business, because there's a huge choice. Look beyond the ultra-cheap options and - for a reasonable price -there are plenty of good-quality options.The headline benefit of Japanese company Audio-Technica's ATH-CKS50TW earbuds is their battery life. The buds themselves can play for 20 hours between charges. You charge them within the case, which itself holds enough power for another 30 hours of playback. Once both are drained, the case and buds can be recharged quickly, with 90 minutes of playback available from a 10-minute charge.
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