I came across a charger which is said to be the longest charging cable in Nigeria market, it 16ft that is 5 Meter.
Literally its length is equivalent to 4 ceiling boards.
It is made up of Flat Anti-Tangle MicroUSB Cable for mobile devices with Micro USB charger/data port Connect to charge your mobile device Extra-long to connect where you need it Durable cable jacket protects wire cores and resists kinks and tangles Flat cable allows you to keep your wires tidy and go under carpets etc. Compatible with Blackberry, Tecno, HTC, Samsung etc & any microUSB phone.
Source: Kinfo Village