Instruction: Answer the given question using the supporting document.

Input:
Question: How do I install the battery?
Document: The battery compartment was broke right out of box. Batteries do not last long before recharging. Too expensive. I got a Sony headset at Walmart for $30.00 and it blows this one away. I don't see how anyone would pay this much money for headset that is inferior to a lot of cheaper models.
I read a bunch of reviews on this and didn't believe it was THAT great...until I got it! The sound is awesome! the bluetooth is awesome! Even if your battery runs out, there's a cord that lets you plug it into your phone or whatever you're using! The USB charger even plugs into my universal wall charger and charges my headphones! Worth buying!
I ordered two pairs of these headsets. I'm not sure why, but they had already been opened. One did not work, the other was missing the box with the battery and cords. I hope the seller will give me a refund and return the product for ones that have not been opened. When I plug the one pair in to charge it does not charge and the cord gets really hot. I hope to get a pair that works soon.
This is my second set as I broke my first set when I sat on them. They cost me $119 here on amazon. I was shock to seeing them selling them for $69, until I received the set. This a meant to be sold in Asia. The warranty is written totally on a Asian language. My first set the battery was inside. This set I am struggling like hell to get it in as are so many when searched on Google and the URL to the company does not work.
I did find a blog that tells the story. Basically if you need to use the warranty your out of luck.
I cant cennect to my phone, my labtop, anything wiz bluetooth. More than useless. The line is too short. this is not the headphone i want
Great sound when plugged in, but, the wireless feature needs lots more to be desired. I could not connect to my Mac  laptop or my samsung phone wirelessly.
I am deeply disappointed in them, and I urge you to be very careful before buying any of their products as to exactly what hardware and software they require, and whether customer support is actually available.I shall certainly never buy anything made by Syllable again.
I do not like the sound of sports on the tv, unfortunately my special friend does. These headphones allow me to listen to my music in the same room as the tv. Relationship saved. He is happy. I am happy. The sound quality is amazing and they are super comfortable. And the price is right.
I ordered the Syllable G08 Bluetooth headphones. I should have noticed that the specifications did not include what version of Bluetooth it uses. In fact its version is later than the one on my laptop and I could not get my laptop to recognise the headphones. The little installation booklet had no suggestions in case of difficulty. The Syllable website was useless to me, being entirely in Chinese (or some other East Asian language).
Answer: The battery goes under the cap on the left earpiece. On the back of the speaker, twist the cap counter clockwise and it pops right off.