JOHNYSTARLong-term mass production and processing of various electronic small goods, diverse and novel styles, low price reasonable, stable quality reliable, elegant packaging.

1) standard 4000 mah
2) Input: 5 v - 1 a
3) the Output: 5 v - 1 a     4) conversion rate: 90% or greater
5) overcharge, over-discharge, overload, short-circuit protection