Can I use the iPhone 6 Plus charger for an iPhone 4 and iPhone 5?

Can I use the iPhone 6 Plus charger for an iPhone 4 and iPhone 5? - 1

The cord? It will work on the iPhone 5 but not the 4. The iPhone 4 uses the old 30-pin connector.

The wall brick is just a USB input so it can take any USB charge cable.

You can for the iPhone 5 but not for the iPhone 4. IPhone 4 has a completely different charger.

You can use the iPhone 6S plus charger for a 5 but not a 4. Apple has changed the charging port from the 30 pin connector to the lightining cable after the iPhone 4S

The 6 uses a lightning USB. So the 4 is out.

4 - no
5 - yes

It might blow up fam

It migh