| The original battery is a 3.7V 1400mAh battery manufactured by Ascent Batteries. |
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| Model: ABI-H832370 |
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| Original battery dimensions: |
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| H 6.35 mm |
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| W 22.22 mm |
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| L 69.85 mm |
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| This battery also has a yellow wire for an NTC thermistor, embedded in the battery pack, to monitor battery temperature while charging. |
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| ***Replacement Battery*** |
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| Although it's a [link|https://www.amazon.com/gp/product/B0C2PNXDZH/|1100mAh battery|new_window=true], the dimensions fit the internal battery compartment. |
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| Note: I couldn't find a battery with the same/smaller dimensions and an NTC thermistor. Please leave a comment if you were able to find a better/more suitable replacement. |
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| ***Steps*** |
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| # If the droid can still hold a bit of charge, open the Sphero app to connect to it and extend its central leg, then jump to step 2. Otherwise, you'll have to first remove the lateral legs. Using a [product|IF145-259|Jimmy|new_window=true], start by removing the small covers of the arms and then remove the 3 screws holding the arms. Be careful to not break the wires connecting the arm to the body. |
| # Remove the two bottom screws holding the bottom ring. Remove the bottom ring. |
| # Turn the droid off to retract the central leg. |
| # Use the [product|IF145-259|Jimmy|new_window=true] again - or other equivalent prying tool - to remove the two vertical back panels. |
| # Remove the screws holding the back of the droid. |
| # Slowly work your way to separate the back of the droid from the front. |
| # Now you should have access to the internal components. |
| # Carefully unplug and remove the original battery. |
| # The original battery connector is proprietary, has 3 wires (red, yellow, black) and needs to be spliced in the new battery. Remove the connector from the replacement battery and splice the wires with the original connector - leaving the yellow wire out depending on the replacement battery model. |
| # Insert the new replacement battery back and plug the connector. |