The G5's talk time stands at around four hours and standby time goes up to 150 hours, but Nextink has come up with a rather clever idea to extend battery life.
Above is a picture of the G5's carrying case -- this humble-looking box also doubles up as a charger and every time you pop the headset in, it recharges it, giving you an overall battery life of up to 20 hours talk time and 30 days standby time.
Audio quality during calls is okay, but we did notice some muffling, albeit relatively little. Accepting calls is done by pressing a button on the side, which works fine, but we think this would be even better if it had a touch-sensitive system similar to the Bluetrek Sense.
You can buy the Invisio G5 from Carphone Warehouse for about £80. -Andrew Lim
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