HT1550: The HT1550 is a MOTOROLA ORIGINAL BATTERY. The HT1550 Battery is also known as HNN4003BR may also be known as HNN4003B and HNN4003. IMPRES™ Technology. Premium Battery - Lithium Ion (Li-Ion), 2000 Milliamps, 7.5 Volts. Motorola Original Batteries are ruggedly designed for lasting durability and system tested with Motorola two-way radios to ensure optimum performance. We offer three chemistry alternatives as well as various capacity offerings, allowing the user to select the ideal battery for his or her needs. NiCd is best suited for extremetemperature operation and provides the maximum number of charge/discharge cycles. NiMH and Li-ion batteries offer extended duty cycles – providing more talk time per shift. Does not include belt clip. Fits: GP320, GP340, GP360, GP380, GP640, GP680, GP1280, HT750, HT1250, HT1250-LS, HT1250-LS+, HT1550, HT1550-XLS, MTX8250, MTX8250-LS, MTX850, MTX850-LS, MTX9250, MTX950, MTX960, PR860, PRO5150, PRO7150, PRO9150, XLS, Waris HT750. This Battery is Cross Compatible with the Following Battery Models: HNN9008AR, HNN9009AR, HNN9010AR, HNN9011BR, HNN9013DR, HNN9012BR, HNN4001A, HNN4002A, HNN4003BR. You can also use the empty CLAMSHELL with (12 AA batteries) that will create 5000mAh-- part number NNTN5332A