Step 1: Remove Battery.
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
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
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.