MPO1221 RTP SLOT If the batteries do run completely out of juice or if you remove them, most devices have an internal backup battery that provides short-term power (typically 30 minutes or less) until you install a replacement. The battery life depends on what kind of PDA you have and how you use it. Some models use alkaline (AAA) batteries, while others use rechargeable batteries (lithium, nickel-cadmium or nickel-metal hydride). There are two types of general-use handsaws, and it's a good idea to have both on hand. PDAs and smartphones typically have one of two types of operating systems: Palm OS or Windows Mobile. The higher end smartphones have resolutions and other capabilities that rival many digital cameras on the market. However, RIM makes a specific OS for its BlackBerry devices, and the Symbian OS operates some smartphones.|Anda dapat Membantu Wikipedia dengan Mengembangkannya