Tianyu P30 Payment Terminal Replacement Battery 7.4V 2600mAh

Tianyu P30 — 7.4V Li-ion Replacement Battery

This 7.4V 2600mAh (19.24Wh) Li-ion battery fits the Tianyu P30 portable payment terminal. The P30 is a handheld card processing device used in retail and hospitality environments where merchants need consistent power through a full shift. This battery replaces a degraded or failed original cell and restores normal terminal operation.

• Tianyu P30 platform fit: The P30 uses a 7.4V two-cell Li-ion pack with a specific connector orientation and BMS handshake. This battery matches that voltage rail and connector, so the terminal's charge controller recognises it and accepts the charge cycle without throwing a battery fault code.
• Bench tested on actual hardware: We ran this battery through a full charge cycle and simulated transaction loads — including printer motor draw and wireless bursts. The BMS held steady through each current spike without triggering an overcurrent cutoff.
• First deployment tip: After fitting this battery, complete one full transaction cycle before deploying the terminal in a live environment. The P30 maps capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator correctly.

Payment terminal rebooting mid-transaction after battery swap

The P30 combines wireless communication, display backlight, and a thermal receipt printer on a single battery rail. When the printer motor fires, it draws a short burst of current that can exceed what the BMS expects from a new, unconditioned cell. The BMS interprets this spike as an overcurrent event and cuts power to protect the cell — which the terminal registers as a hard reboot. Running one full charge-discharge cycle before live deployment allows the BMS to learn the normal draw profile and stops it from tripping on printer motor surges.

Terminal not powering on after sitting unused in storage

Li-ion cells self-discharge slowly over time. If the P30 has sat unused for several months, the cell voltage can drop below the BMS recovery threshold — typically around 2.5V per cell — and the terminal will show nothing when you press the power button. Connect the terminal to its original charger and leave it for at least 30 minutes before attempting to power on. Most BMS circuits include a recovery trickle mode that brings the cell back above the cutoff threshold at a low charge rate; once voltage recovers above approximately 3.0V per cell, normal charging resumes.