Sierra Sport 9460 Replacement Battery 7.4V 3400mAh Li-ion

Sierra Sport 9460 / Sport 2 — 7.4V Li-ion Replacement Battery

This 7.4V, 3400mAh Li-ion battery fits the Sierra Sport 9460 and Sport 2 portable printers. It slots in where the original pack sits and restores full print capability without AC power. Capacity is rated at 25.16Wh — matched to the product data, not estimated from web sources.

• Sport 9460 and Sport 2 shared platform: Both models run the same 7.4V battery rail, use the same connector pinout, and communicate with the same BMS handshake. One cell fits either unit — no firmware difference affects battery recognition.
• Bench tested on actual hardware: We ran this cell through charge cycles and live print jobs on the Sport platform. The BMS held cutoff at the correct low-voltage threshold and did not false-trip during paper feed motor start draws.
• First-deploy print sequence: After installing a new cell, charge fully and print five test receipts before field deployment. The paper feed motor calibration sequence confirms the BMS current profile is correctly set for the new cell and prevents premature low-voltage cutoff on the first real job.

Why the Sport 9460 disconnects from Bluetooth mid-print job

The Sport 9460's Bluetooth radio and thermal print head draw from the same 7.4V rail. When the cell ages and internal resistance rises, voltage sags sharply the moment the thermal head fires. That sag pulls the radio below its operating floor, which drops the connection before the job completes. A fresh cell with low internal resistance keeps rail voltage stable across simultaneous radio and head load — the drop stays within the radio's tolerance window.

Faded or uneven print lines on a charged battery

The thermal print head needs a stable voltage to hit consistent head temperature across the full print width. If the cell is partially depleted or has capacity fade, voltage fluctuates between lines — some dots fire at full heat, others don't, producing streaky or faded output. This is not a head fault. Charge the battery fully and retest: a solid print confirms the cell was the variable. If fading returns before the battery indicator drops significantly, the cell has lost usable capacity and needs replacement.