About this replacement
Canon PowerShot G10 / G11 / G12 — 7.4V Li-ion Replacement Battery (NB-7L)
This is a 7.4V, 1050mAh Li-ion replacement for the Canon NB-7L battery. It fits the PowerShot G10, G10 IS, G11, and G12 compact cameras. The cell slots into the same battery compartment and connects to the same charging contacts as the original.
- G10 / G11 / G12 platform fit: All four models share the NB-7L form factor, voltage rail, and battery door latch geometry. The BMS communication protocol is identical across the G10 through G12 lineup, so one cell covers all four bodies without modification.
- Bench tested on actual hardware: We cycled this cell through Canon's OEM charger and directly via the camera body charging port. The BMS accepted the cell on both paths, reported charge status correctly, and held voltage within spec across the discharge curve.
- First-cycle conditioning on G-series bodies: Run one complete charge cycle through the camera body or OEM charger before your first shoot. The G10 and G11 battery-remaining indicator maps to the cell's discharge curve during that first cycle — skipping it can cause the percentage display to read inaccurately for the first few sessions.
Flash capacitor recharge drawing the NB-7L down faster than expected
The PowerShot G12 and G11 use a built-in flash that pulls a sharp current spike each time the capacitor recharges between shots. At end-of-charge, when cell voltage begins to sag, that recharge current becomes harder to deliver cleanly. The BMS may interpret repeated sag events as a low-voltage condition and begin throttling output. This shows up as slower flash recycle times before the camera signals low battery. Keeping the cell above 7.0V under load is the practical threshold — below that, flash performance degrades noticeably.
Battery percentage jumping or dropping suddenly mid-shoot
This happens when the camera's fuel gauge hasn't mapped its percentage thresholds to the new cell's discharge curve yet. The G10 and G12 bodies calibrate indicator steps against voltage checkpoints — a new cell with a slightly different curve can cause the readout to skip steps or drop from 50% to near-empty without warning. It usually corrects itself after two or three full charge-discharge cycles. Run the battery down to camera shutoff, then charge fully to 8.4V — repeat twice and the display stabilises.