3 tools show the battery percentage 84 but my phone show 78 why

Hello shajidur112!

I also have no idea what 3 tools is, but edclange seems to!

Anyways, if your device shows 78% Maximum Capacity (MC), then it’s time for the battery to be replaced. Apple recommends you have it replaced when the MC is at 80%.

Use this link to book an appointment: iPhone Battery Repair & Replacement - Apple Support.

Have a nice day, and good luck!

The best way to use 3 tools is to delete it. It is not safe and should not be trusted,

shajidur112 wrote:

3 tools show battery health 84 but my mobile shows 78 why

What 3 tools?