For now, impeccable battery, I could charge my Wiko Stairway (2000mAh battery) ~ 4-5 times in 1h-1h30 the battery itself is recharged quickly (~ 8-9h) by plugging the night the next day she was fully charged.
The overall look inspires confidence and is well made (no game in plastics, molded well and USB ports).
Only downside: Instructions in Chinese, but you can find instructions on the net.