User manual LA CROSSE TECHNOLOGY RS900

[. . . ] Observe the recommended charging current of the rechargeable batteries. Never adopt a charging current higher than recommended in the charging process. Never use any power cable and transformer other than those originally supplied with the charging unit. The rechargeable batteries may become hot during charging (especially when high charging current is chosen). [. . . ] The subsequent pressing of the mode key will enable to toggle between the "Charge", "Discharge", "Test" and "Refresh" mode. ) Then within 4 seconds from the last key pressing, user may select the charging/ discharging current by pressing the CURRENT key. Note: There is a 4-second time allowed for choosing further functions after each key pressing. If no more key is pressed, the LCD will blink one time to indicate the end of setting. Afterward, the current can no longer be changed during the process and the selected mode will be undergone. 44 After 4 seconds from no more keys pressing, the LCD will blink once to indicate the setting is confirmed and the selected mode activated Charging current: 200 mA Charge Mode During charging, the different displays- Charging current (in mA), Time elapsed (in hh:mm), Terminal voltage (in V) and Accumulated capacities (in mAh or Ah) may be toggled and selected by pressing the DISPLAY key (refer Table 4). After the rechargeable battery is fully charged, "Full" sign will be shown on the display and the user may take out them at this time. Or if the rechargeable batteries are kept placing at the compartments, trickle charging will start. The trickle charging current is around 5% of the selected charging current to keep the rechargeable batteries being full. 45 "Full" sign is shown -The battery is fully charged Note : The current cannot be altered once the setting has been confirmed in the initial stage. This can avoid the user changing the current setting accidentally while doing setting on other rechargeable batteries. If one wants to change the applied current afterward, the rechargeable batteries must be taken out and inserted again. The maximum charging current of other rechargeable batteries are restricted by the current setting of the first inserted rechargeable battery. For instance, if the first inserted rechargeable battery is set to charge at 700 mA, then the second, third and fourth rechargeable batteries can be only set to charging at a maximum current of 700 mA. 46 Therefore, user is recommend to place the battery with the highest expected charging current at Compartment 1 first. To release the restriction of setting charging current, user shall take out all four rechargeable batteries from the charging unit. To change the operating mode during charging, one can press the MODE key (for selecting all rechargeable batteries) or NUMBER key then MODE key (for selecting individual rechargeable battery). 4 seconds after the last key press the LCD will blink one time to indicate the end of changing. When overheating condition occurs (over about 53°C, usually due to too high a charging current selected), the charging will be stopped immediately and the display will shown "000 mA", the charging process will only resume once the temperature of the rechargeable batteries drops to a safe level. If overheat conditions continue to occur, the rechargeable batteries shall be taken out to cool down and then charged at a lower current. When the battery is overheated the charging will ceases automatically. "000 mA" will be displayed. 47 For new rechargeable battery it is recommended to charge it with 200 mA current for reconditioning it from the long storage status. DISCHARGE MODE Discharge mode will first discharge the rechargeable battery then charge it. It is for removing the memory effects of rechargeable batteries. By pressing the MODE key within 8 seconds after inserting the rechargeable batteries, the Discharge mode can be selected. (The mode key shall first be pressed and held for 1 second to activate the mode change. The subsequent pressing of the mode key will enable to toggle between the "Charge", "Discharge", "Test" and "Refresh" mode. ) Then user may also select different discharging current (see Table 2) by pressing the CURRENT key, within 8 seconds after inserting the batteries. (The display will blink once to indicate the setting has been confirmed and the current cannot be changed afterward. ) 48 Discharging current: 250 mA Discharge Mode Note: The discharging current is always set to be half of the coming charging current whose upper limit is 1000 mA (see Table 2). [. . . ] The specifications of this product may change without prior notice. No part of this manual may be reproduced without written consent of the manufacturer. 62 CAUTION - SAFETY INSTRUCTIONS : Attention of users is drawn to the following important safety instructions: · As stated in the manual above », only use NiCd or NiMH rechargeable batteries. · Indoor use only, do not expose to humidity. Do not place in water or submit to rain and/or snow. [. . . ]