2A140MC Size : AA Ni-MH Specification d Type: Rechargeable nickel metal hydride battery Dimension D.......................................................... 14.0 d........................................................... 5.0 H.......................................................... 50.0 h........................................................... 1.5 h 0.2mm 0.2 mm 0.5 mm 0.5 mm H Nominal Voltage................................................. 1.2V (with jacket) D Weight................................................................ 27g Volts Internal resistance At 1000Hz..................................................... ~30 m 1.6 1.4 0.1C 1.2 Capacity Rated capacity..............................................1400mAh 1) At 0.2C discharge......100~105%of rated capacity. 2) At 0.5C discharge..........95~98%of rated capacity. 3) At 1C discharge.............90~95%of rated capacity. 1 0.8 0.6 0.4 0.2 0 0 1) Slow charge 140mA x 15hrs. (0-45 C) To avoid overcharge, a timer is used to terminate the charging after 150% capacity input. 20 40 60 80 100 120 140 160 Capacity % 0.1C Rate Charging Curves Volts 1.6 2) Normal charge 700mA x 2-3hrs. (10-45 C) To avoid overcharge, a timer is used to terminate the charging after 150% capacity input. A joint use of dT or - V cut off is required. For dT control, a maximum allowable temperature rise is 1 C/min. Or if - V control is used, the maximum allowable voltage decrease is 10 mV/cell. In addition, a temperature cut off (TCO) device, i.e. thermostat, with cut off temperature at 55 C must be used for safety purpose. 0.2C 0.5C 1.4 1.2 1 0.8 0.6 0.4 0.2 0 0 20 40 60 80 Capacity % 100 120 140 0.2C/0.5C Rate Charging Curve 3) Quick charge Quick charge over rate 0.5CA is not recommended. Volts 1.6 Storage: 1) Storage Temperature........................-10 C to 45 C 2) Remain trace of charged capacity for prolonged period of storage. 3) Slow recharging of stored batteries for every 3 months. 1.4 1.2 1 0.5C 0.2C 1C 0.8 0.6 0.4 0.2 0 0 Remark: Weight and internal impedence are for reference only. 20 40 60 Capacity % 80 100 120 0.2C / 0.5C / 1C Rate Discharging Curves