The U-Charge RT series is a family of lithium ion phosphate batteries based on the standard U1 size, ready for “drop-in” replacement for lead-acid batteries. They can be attached in series up to 48 volts and parallel for additional capacity. Take advantage of longer run time, zero maintenance, lighter weight, reduced charge times and high frequency operation. For more information visit www.lithiumwerks.com or call (512) 527-2900.