iPhone 6s Plus Car Charger

[robinhood1701]

Just got a iPhone 6s Plus, first time using it in the car on sat nav, noticed battery level going down on car charger, a griffin power jolt dual usb, any ideas for a more powerful charger, saw this - aLLreLi 48W (5V 9.6A) 4 Ports Smart USB Car Charger - aLLreLi Technology
Is it to powerful ?

 

[JayCee]

No, it can't be "to powerful"
The phone will only draw as much current as it needs.

 

[robinhood1701]

Ok, thanks for that, I got the three port model of the above, charges great, old griffin didn't keep up when using phone on sat nav !