Hello, Ashley- After speaking to stakeholders in countries like Azerbaijan and Georgia and with people who are currently using Buzzy in Kenya, it seems that the issue was less whether it was battery or solar powered and more why pain care mattered. From the unicef webinar I took away that novel ways to encourage caregivers to feel a sense of urgency about getting vaccinated What is far more important than whether the device is solar powered. The device can use rechargeable batteries that are attached to a solar powered adapter, which is currently available. I also realized that $50,000 is not enough to re-design and retool, but it is enough to create meaningful education materials and provide Buzzy units in a way that will provide proof of concept in 10 countries. I changed my application to reflect this new goal a week or so ago after returning from a state Department trip to the Republic of Georgia.