BATT MANAG, USB, 20WLCSP; Battery Type:Li-Ion; Input Voltage:5V; Battery Charge Voltage:4.2V; Charge Current Max:1.25A; Battery IC Case Style:WLCSP; No. of Pins:20; No. of Series Cells:1; Operating Temperature Range:-40°C to +125°C; SVHC:No SVHC (19-Dec-2011)