Thank you for reaching out via the Bose Community. Welcome to the site.
I'm sorry to hear you are having issues with your Cinemate Series II remote. To enable me to assist you more effectively, can you please go into more detail?
I'll look forward to your reply.
Jeff G - Community Support
Hit power button on remote and nothing happens thinking battery might be dead change it 3x before it finally works maybe weak batteries ?? But it works now 🤦♂️