Replace THREE Group 31 AGM batteries with ONE N3275-36D 38.4V 75Ah (2,850 Whr or 173 reserve minutes) Lithium Ion Trolling Battery and get certified NMEA 2000 connectivity! Power up bass boats and shallow-water fishing vessels with a lighter, faster, more fuel-efficient design. Get all your battery information on the built in OLED display and over the network right to your MFD. Recharge with an on-board DC charger (sold separately). Same size footprint, taller by 1.5", and only 46 lbs. Install quickly and win with a trolling battery that lasts all day. Assembled in East Tennessee, USA.