0.9V ~ 5V to 5V 600MA USB Output charger step up Power Module Mini DC-DC Boost Converter Go to amazon.com Related posts Thing need consider when find 0.9 5 5 600ma? DescriptionOutputFrequency:600MA OutputPower:1-50W OutputType:Single Size:34(mm)x16.2(mm) Type:DC/DCConverters OutputCurrent:600MA is_customized:Yes Weight:600MA