LOGIC:A typical refurbished e-bike battery service in Birmingham, offering a digital warranty and certified safety, can command a price point of £200-£350, significantly undercutting new packs at £500-£700. Our target gross margin of 55% assumes a Cost of Goods Sold (COGS) of £90-£160 per pack, covering new cell replacements (for partial refurbishment), BMS components, casing, and consumables. However, local operational costs are substantial: Rent for a suitable 750 sq ft light industrial unit in Birmingham's Central-Hub logistics zone (e.g., Tyseley, Bordesley Green) can range from £8,000-£12,000 annually (£10-£16/sq ft), plus business rates and high utility costs given specialized power and ventilation needs. This makes rent a 'High' impact fixed cost for a lean operation. Furthermore, skilled technicians capable of handling Li-ion refurbishment to UK safety standards command wages upwards of £30,000-£45,000 per annum, representing a significant labor cost component. Add specialized insurance, IS/IEC certification maintenance, and last-mile logistics within Birmingham's CAZ, and high throughput is critical to absorb these fixed and semi-fixed costs and realize healthy net profits.