If you want something lightweight, has great battery life and with bright, clear sound, the Plantronics Backbeat Go 3 is decent choice. At S$169, it's selling at a pretty reasonable price.

Absolute power corrupts absolutely; lack of power is just freakin' annoying. The new Plantronics BackBeat GO 3 is a wireless, sweatproof earbud that solves the lack of power problem in a unique and clever way.