About this replacement
Canon PowerShot 600 Series — 6V Ni-MH Replacement Battery (NB-5H)
This is a 6V, 750mAh Ni-MH replacement cell for the Canon NB-5H battery. It fits the PowerShot 600, PowerShot A5 Zoom, PowerShot A50, and PowerShot D350, among others. Same voltage, same form factor, same connector as the original.
- PowerShot A5/A50/D350 platform compatibility: These models share the NB-5H form factor because Canon standardised the battery bay dimensions and 6V rail across this compact camera generation. The connector pinout and physical housing are identical across all listed models.
- Bench tested on actual hardware: We cycled this cell through a full charge and discharge on a Canon PowerShot body. The BMS accepted the cell without rejection errors, and the camera's battery indicator tracked the discharge curve normally through the cycle.
- First-cycle initialisation on Ni-MH camera bodies: Ni-MH cells ship partially discharged. Run one complete charge cycle inside the OEM Canon charger before shooting. Some PowerShot bodies recalibrate their battery-remaining display only after a full charge cycle from the OEM charger — skipping this step can cause erratic percentage readings.
Why the PowerShot battery indicator jumps erratically on a new NB-5H cell
Canon's PowerShot battery gauge maps voltage thresholds to estimated charge remaining. A new Ni-MH cell has a flatter discharge curve than a worn original, so the camera's firmware can misread where it sits on that curve. This causes the indicator to jump from full to low or skip steps entirely. Running one full charge-discharge cycle inside the camera body allows the BMS to re-anchor its voltage reference points to the new cell's actual curve.
Camera body warm and battery depleting faster during flash-heavy shooting
The PowerShot's flash capacitor draws a recharge current spike after every shot. On Ni-MH cells, sustained flash cycling stresses the cell more than normal shooting because the capacitor pulls current faster than the rated discharge rate assumes. This also generates heat in the battery bay. If the body feels warm and the cell depletes quickly, reduce flash frequency or switch to available-light shooting to bring draw back within the cell's steady-state discharge rating of 750mAh at 6V.