Having an extra battery is always wise to minimize downtime in your business. The SPT 1700, SPT 1800, PPT 2800, and PPT 8800 uses a 3.7V, 1700mAh Lithium Ion battery. Although each battery has an expected life of over 10 hours per charge. Businesses using the terminal on multiple shifts can use the spare battery and keep recharging the unused battery. Average time needed to fully recharge a drained battery is two (2) hours.