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.
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Step 1: Remove Battery.
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…
Step 2: Replace Battery
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.
Step 3: Reassemble
Step 4: Calculations
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.