Panasonic DS-1 Replacement Battery 7.4V 2000mAh Li-ion

Panasonic DS-1 / DS-5 / DS-100 / DX-1 Series — 7.4V Li-ion Replacement Battery

This 7.4V, 2000mAh Li-ion battery replaces the original cell in Panasonic DS-1, DS-5, DS-100, DX-1, and compatible compact digital cameras. It delivers 14.8Wh of capacity through the same physical form factor and connector as the OEM cell. Dimensions are 70.80 × 38.50 × 21.00mm — confirm your original cell matches before installing.

• DS-1 / DS-5 / DS-100 / DX-1 platform fit: These models share a common battery bay geometry, connector pin layout, and BMS communication protocol, which is why one cell covers the full group. The 7.4V nominal voltage rail matches what each camera body expects at startup and during active image processing.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on compatible camera hardware, monitoring the BMS handshake at both startup and mid-session. The protection circuit responded correctly to charge termination and to low-voltage cutoff — no false trips under normal shooting load.
• First-cycle calibration on camera bodies: Insert the new cell and run a full charge through the OEM charger or inside the camera body itself before heavy shooting. Some Panasonic camera BMS systems only update the battery-remaining display to the new cell's discharge curve after completing that first full in-body charge cycle.

Flash capacitor recharge current sag at the end of cell life

As a Li-ion cell ages, internal resistance rises. The flash capacitor draws a short, sharp current spike to recharge between shots — and a high-resistance cell can't sustain that spike without voltage dropping. The camera reads the sag as a low-battery condition and may lock the flash or slow recycle time. If flash recycle is noticeably slower on a new battery, confirm the cell voltage is sitting above 7.2V at rest — anything lower points to a partially discharged or degraded cell, not a camera fault.

Battery percentage jumping erratically on the DS-1 display

This happens because the camera's fuel gauge maps voltage thresholds that were calibrated against the original OEM cell's discharge curve. A new third-party cell discharges with a slightly different slope, so the gauge skips between percentage steps or reads full and then drops suddenly. It is not a defective battery. Run two full charge-to-discharge cycles through the camera body and the display will stabilise as the BMS learns the new curve. After two cycles, the indicator should track smoothly from 100% down without jumping.