The PHL 1300 powers you through a full day's work on a single charge. 8 MB of data memory is large enough for intensive data collection applications. Clever design extends battery life and protects data. Operates on two AA batteries or an optional LiON rechargeable battery pack. The low battery drain can be further reduced using the selectable automatic power-down feature. Battery backup maintains data for up to 21 days even when main battery power is lost. PHL 1300 is small, light and ergonomic with a simple keypad layout anyone can use. Don't let the graceful, uncluttered design deceive you. It is packed with features usually found in more costly terminals.