Oral B Pro 4000 toothbrush not charging | How to replace the battery 🔋

Is your electric toothbrush losing its fight? This video will show you how to diagnose a dying battery and replace it yourself, giving your brush a new lease on life! We'll tackle removing a stubborn cap (avoiding scratches!), desoldering the main board (safety disclaimer included!), and using readily available tools to bring your brush back to top brushing condition. Let's get started!