The two battery models involved are Motorola models NLN6761A (M1) and NLN4463B (M2). The M1 is a slow-charging battery requiring a minimum 16-hour charging period at a nominal voltage of 15 and a capacity of 450 milliampere hours. The M2 is fast charging, with a 1-hour minimum charging period at the same voltage and capacity as the M1. The National Institute of Justice standard for such batteries is that they provide a minimum service of 8 hours, or one shift, when discharged at ambient temperatures (68-86 degrees Fahrenheit) during continuous operation with a 10-10-80 duty cycle. All 14 batteries tested (7 of each model) met all the minimum requirements of the standard during both the service life tests and the internal connection tests. In addition, M1 met all labeling requirements except for recharge rate, although the month and year of manufacture appear in code. M2 met all labeling requirements except for rated capacity and recharge rate, with the month and year coded. 1 table.