La Crosse Technology BC-1000U - Manual (Page 43)

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The No. 4 display will flash after
the compartment No. 4 is pressed
Within 8 seconds, press and hold the MODE key for 2 seconds then press and release
the MODE key to select the ―Refresh‖ mode.
12. Within 8 seconds from the last key press, select the refreshing current in the test mode:
100, 250 or 350 mA.
13. 8 seconds after the last key press, the display will blink once to indicate that the time
allowed for setting is over and the Refresh mode in compartment 4 will start.
14. Once charging has started, the current can no longer be changed.
15.
Now, batteries in compartment 1 and 2 are being charged, while batteries in
compartment 3 and 4 are undergoing Test and Refresh mode respectively: During the
operation, press and release the DISPLAY key, to view various display modes.
16. ―Full‖ sign (or trickle charge current) will be displayed once the battery is fully charged.