Pax S900 Compatible Battery 7.4V 2200mAh IS509 Warranty:Warranty 3 Year confirming stable 12V delivery across

confirming stable 12V delivery across the BMS handshake and sustained load during simulated voter interaction sequences without voltage sag tripping the low-battery cutoff

USB-PD or proprietary fast charge not activating after battery replacement

the base sees no battery and shows no charge indicator

The BMS held voltage within the expected LiFePO4 flat window and triggered cutoff cleanly at the low end without voltage sag tripping the driver prematurely

covering the Chic

Pax S900 Compatible Battery 7.4V 2200mAh IS509 Warranty:Warranty 3 Year confirming stable 12V delivery acrossPax S900 7. 4V Li ion Replacement Battery (IS509) This 7. 4V 2200mAh Li ion battery replaces the original IS509 cell in the Pax S900 portable payment terminal. The S900 is a mobile POS device used for card processing and tap payments in retail and hospitality environments. Voltage and capacity match the original spec exactly no hardware modification required. Pax S900 fitment: The S900 uses a dedicated battery bay with a keyed connector that only