bq25071/bq25071-Q1 Linear Battery Charger Texas Instruments bq25071/bq25071-Q1 1A Single-Input Single-Cell Linear Battery Charger is a highly integrated, linear, LiFePO4 battery charger targeted at space-limited portable applications. It accepts power from either a USB port or AC adapter and charges a single-cell LiFePO4 battery with up to 1A of charge current. The 30V input rating with 10.5V input overvoltage protection supports low-cost unregulated adapters.