With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
bsnTagBatteryStatus
bsn Tag Battery Status
1.3.6.1.4.1.14179.2.1.18.1.4
Battery Status of the RF ID Tag.
Back to AIRESPACE-WIRELESS-MIB MIB page.
IPHost Network monitor allows you to monitor bsnTagBatteryStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.