Quick answer
If you are searching for phone battery replacement in Epping, start by checking battery health. On iPhone: Settings → Battery → Battery Health and Charging. Below 80% maximum capacity means replacement is due. On Android, Samsung has a built-in battery check — Settings → Battery → Battery Health. Other Android brands vary. If the phone is more than two years old and losing charge fast, a replacement battery is almost always the right move before considering a new phone.
Helpful next steps
Start with the section that matches your situation, then use the linked page for the next step.