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Doing it the right way!

Advanced, much more power efficent

What you need!

• TP4056/TP4057 3.7v Battery Charger (or any cheap 1S charger) - charges the battery
• a 3.3V Buck Boost (preferably the TPS63020) - regulates to VMAIN
• a small battery (eg. 601520 150mAh) - new battery

Preparing the battery

1. get your soldering iron, battery, and battery charger
2. solder the red battery wire to B+
3. solder the black battery wire to B-

Preparing the Buck Boost

1. get your battery charger and buck boost converter
2. solder the buck boost IN- to the battery charger's OUT-
3. solder the buck boost IN+ to the battery charger's OUT+

Preparing the Cube

1. remove the battery and battery door from the cube
2. wedge something in between each corner of the top of the cube (where the lights are, i used guitar picks)
3. remove the top of the cube from the main cube assembly
4. clip each light tab to release the pcb from the top assembly

Finding the Boost

This is the hard part, theres multiple revisions of cubes, you'll need to find yours, to simplify:

1. find all the SOT-23-5 packages on the main pcb
2. test each pin against the negative battery terminal with the cube powered via a benchtop psu
3. find the out that reads 3.3V and the one that reads the bench voltage
4. desolder the SOT, and solder a thin wire between the 2 pins
5. congrats your cube now takes 3.3V

Wiring into the cube

1. get your buck boost
2. desolder the 2 battery terminals (the pin and the spring)
3. solder the buck's OUT- to where the spring terminal was
4. solder the buck's OUT+ to where the pin terminal was
5. place the battery, battery charger, and buck gently into the main cube assembly
6. press the cube top back into the cube bottom

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Doing it the EASY way!

What you need!

• TP4056/TP4057 3.7v Battery Charger (or any cheap 1S charger) - charges the battery
• a 1.25-1.5V Buck Converter - regulates to the N Cell Voltage
• a small battery (eg. 601520 150mAh) - new battery

Preparing the battery

1. get your soldering iron, battery, and battery charger
2. solder the red battery wire to B+
3. solder the black battery wire to B-

Preparing the Buck

1. get your battery charger and buck converter
2. solder the 2 pads next to "1.5V" together
3. solder the buck IN- to the battery charger's OUT-
4. solder the buck IN+ to the battery charger's OUT+

Wiring it into the cube

1. remove the battery and battery door from the cube
2. wedge something in between each corner of the top of the cube (where the lights are, i used guitar picks)
3. remove the top of the cube from the main cube assembly, and get your buck
4. desolder the 2 battery terminals (the pin and the spring)
5. solder the buck's OUT- to where the spring terminal was
6. solder the buck's OUT+ to where the pin terminal was
7. place the battery, battery charger, and buck gently into the main cube assembly
8. press the cube top back into the cube bottom

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