Sony Cyber-shot DSC-T3 NP-FT1 Replacement Battery 3.7V 710mAh

Sony Cyber-shot DSC-T3 — 3.7V Li-ion Replacement Battery (NP-FT1)

This is a 3.7V, 710mAh Li-ion replacement for the Sony NP-FT1 battery cell. It fits the Cyber-shot DSC-T3 and a range of other compact Sony Cyber-shot and DSC-L series bodies. Slot it into the same compartment as the original — same voltage, same form factor, same connector orientation.

• DSC-T3, DSC-T1, DSC-L1 and L1/L series compatibility: These models share the NP-FT1 form factor and 3.7V power rail. The connector pin layout and BMS communication protocol are identical across the range, so one cell covers all of them.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on a DSC-T3 body. The BMS accepted the cell without fault codes, voltage held steady across flash recycling cycles, and the charge indicator tracked correctly through depletion.
• First charge on a new cell: Run the first charge cycle through the camera body or OEM charger — not a third-party multi-charger. Some Sony compact BMS units require an in-body charge cycle before the battery-remaining display maps correctly to the new cell's discharge curve.

Flash output dropping mid-shoot on the DSC-T3

The DSC-T3's flash capacitor pulls a sharp recharge current after each shot. As the cell approaches the lower end of its discharge curve, that recharge draw causes a momentary voltage sag. The camera's BMS interprets the sag as low-battery state and reduces flash power to protect the circuit. If flash output is noticeably weaker in the second half of a shoot, check the battery indicator — if it reads below 30%, the cell is running on the flat section of the discharge curve where sag is most pronounced.

Battery percentage jumping erratically on the DSC-T3 display

The Sony Cyber-shot battery indicator maps voltage thresholds to percentage bars using the OEM cell's discharge curve as a reference. A new replacement cell has a slightly different discharge curve shape, so voltage readings don't always line up with the camera's internal lookup table at first. The display can jump from three bars to one bar without warning, even when charge remains. Run two to three full charge-discharge cycles through the camera body — the BMS recalibrates its threshold mapping against real-world data and the indicator stabilises. After calibration, the display should track consistently down to the 3.0V cutoff.