About this replacement
Canon Selphy QX10 — 7.4V Li-Polymer Replacement Battery (P0930-LF)
This is a 7.4V, 850mAh Li-Polymer replacement battery for the Canon Selphy QX10 compact portable photo printer. It matches the original P0930-LF specification and fits the QX10's internal battery slot directly. Capacity is 850mAh (6.29Wh), sourced to match the OEM cell rating.
- Selphy QX10 fit: The QX10 uses a slim Li-Polymer cell at 7.4V nominal to drive both the Bluetooth radio and the thermal print head simultaneously. Swapping to any other voltage or chemistry trips the BMS and blocks printing entirely.
- Bench tested on actual hardware: We ran this cell through full print cycles on the QX10. The BMS communicated correctly with the printer's charge controller, and the print head heating circuit drew current without triggering undervoltage cutoff.
- First print session prep: Charge this battery fully before your first print job. The paper feed motor and print head heating element pull peak current simultaneously at job start — a partially charged cell can trip the BMS on that first cycle and leave the printer unresponsive until you reset and recharge.
Print quality fading mid-print on a new battery
The QX10 thermal print head requires a stable voltage across the entire print pass. If the cell voltage sags below roughly 6.8V under load, the print head receives inconsistent heat, and the dye transfer becomes uneven — you see banding or colour shifts in the lower half of the print. A new battery with a shallow state of charge at first use behaves exactly like an aged cell in this regard. Charge to 100% before the first session and the voltage holds flat across the print pass.
Bluetooth pairing lost after battery swap
Removing the battery cuts all power to the QX10's Bluetooth module, which clears the active pairing session stored in volatile memory. The printer will not reconnect automatically — your phone or tablet still shows the QX10 in its known devices list, but the printer side has no matching session. Delete the QX10 from your device's Bluetooth settings, power the printer on with the new battery fully seated, and pair fresh from scratch.