La Crosse Technology BC-1000U - Manual (Page 17)

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 For a new rechargeable battery it is recommended to charge it with 200 mA current to re-
condition 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.
Press the MODE key within 8 seconds after inserting the rechargeable batteries; the Discharge
mode can be selected. Then 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.)
Discharging current: 250 mA
Discharge Mode