Battery Mod a Portable Bluetooth Speaker

Replace a portable bluetooth speaker's batteries with larger capacity quadcopter batteries. I'm using a G-Boom bluetooth speaker, but the principle can be applied to any portable unit. All you need is a new battery(s) that matches the voltage of your old batt, and matches or exceeds the mAh rating, and will fit within the speaker.

The battery was housed in the bottom right compartment of the speaker. I removed it because it was swollen.
But, you can see it in the attached photos.

You will notice that it's a 7.4 V 1800 mAh lipo battery. This is a common battery used in RC controlled devices, which means, I can easily find an exact match or better...one that will last longer.

The current battery specs boasted a six hour run time per charge. I want more…

I purchased two Floureon 7.4 V 1200 mAh batteries from Amazon for around $13 each. I placed one in the left bottom compartment and the other in the right bottom compartment .

Next, I soldered the two battery leads together in parallel for a total of 7.4 V 2400 mAh.

The additional 3 wires are for charging individual cells within the battery pack. I won't be needing this added functionality.

I calculated that the addition of two 1200 mAh batteries connected in parallel to replace the one, factory installed 1800 mAh battery, would increase my operating time by 33%. Thats an additional 2 hours of music over factory spec for a total of 8 hours.

However, after two charge cycles and two run tests at moderate volume, I was only able to achieve a 7 hour and 20 minute max run time. I'm a little disappointed.

I did increase the run time with this mod, as I set out to do, but not as much as I had hoped.