The C6 has a removable Li-Ion 1050 mAh battery (BL-5CT), so with a 1amp charger it will take just oer an hour from empty to full. A 2 amp charger would be around 30 mins assuming the phone would take a 2 amp charge.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion.
This is not Customer Service so we are unable to help with account specific issues.Currently using:
Pixel 7a (O2 & Lyca), One Plus 6 (Sfr), iPhone 12 Pro Max (Vodafone)