I install it on CSSU-stable and I have "Not data or Battery is not calibrated".

/home/user/MyDocs # dpkg -i status-area-applet-battery_1.0-6_armel.deb
(Reading database ... 23307 files and directories currently installed.)
Preparing to replace status-area-applet-battery 1.0-4 (using status-area-applet-battery_1.0-6_armel.deb) ...
Unpacking replacement status-area-applet-battery ...
Setting up status-area-applet-battery (1.0-6) ...
gconftool-2: I've been haxored to use xml::/etc/gconf/gconf.xml.defaults as the config source.
Resolved address "xml::/etc/gconf/gconf.xml.defaults" to a writable configuration source at position 0
Attached schema `/schemas/apps/osso/status-area-applet-battery/use_design_capacity' to key `/apps/osso/status-area-applet-battery/use_design_capacity'
Installed schema `/schemas/apps/osso/status-area-applet-battery/use_design_capacity' for locale `C'

Version 1.0-4 has worked reasonably well.