Custom Power Battery Pack Creation

I need a highly skilled engineer to help me bring to life a rechargeable battery pack. This pack will be used specifically to power a mechanical device.

Skillset and experience needed:
- Proficient in battery development and design
- Solid understanding of mechanical devices and how they operate
- Prior experience in designing and creating battery packs

Project specifics:
- The battery pack should meet certain capacity requirements. Exact specifications will be shared upon project award.
- I also need the battery pack to adhere strictly to size and weight limitations. Details regarding these limits will also be communicated during the project's timeline.

I am looking for an expert who can provide valuable insights and recommendations based on their experience in this field.

If you fit the description and can deliver a quality, functional rechargeable battery pack, please submit your proposal.