SparkFun GPS Breakout Development Board is a high quality, GPS board with equally impressive configuration options. The board includes a NEO-M8U module that takes advantage of u-blox’s Untethered Dead Reckoning (UDR) technology. This module provides continuous navigation without needing to make any electrical connection to a vehicle and reduces the cost of installation for after-market dead reckoning applications. The GPS Breakout board is equipped with an on-board rechargeable battery that provides power to the RTC on the NEO-M8U. This reduces the time-to-first fix from a cold start (~26s) to a hot start (~1.5s). The battery will maintain RTC and GNSS orbit data without being connected to power for plenty of time.