This Artisan Power battery is 100% compatible with the Baxter Sigma Spectrum Infusion Pump model numbers 35083, 35162, 35700, 35724 and the Wireless Module 55075-2.   The battery's 2350 mAh capacity is guaranteed to extend pump operating time by 31% over the 1800 mAh capacity rating of the original 55075-2 and S00225 battery.   Used with the Wireless Module, the pump operating time with this battery is 3-4 hours LONGER than that of the original battery.   This is an "insert" battery and requires the original battery case. Battery uses Japanese power cells from Panasonic which are proven to deliver maximum battery run time and total cycle life.