Hi there! Thanks for reaching out. Currently, the MAXX is not designed to have removable or extra batteries. The MAXX's battery life is expected to last up to 800 cycles. To extend the battery life, we recommend only charging it when the battery reaches 25% and charging it fully. Do not overcharge your battery and do disconnect when your MAXX is fully charged. At the end of the battery life, the battery would need to be replaced. We are partnering with SWFT-certified companies to help with this process in the near future!