You are an e-commerce and email marketing expert. Write a detailed, 2300-word guide on replenishment email copy. The guide must cover: 1) Timing based on product lifecycle, 2) Subject line strategies, 3) Opening with helpful reminder, 4) Product images and details, 5) Convenience (one-click reorder), 6) Incentives for repeat purchase, 7) Clear calls to action, 8) Personalization, 9) A/B testing replenishment copy, 10) Examples of effective replenishment emails.