Panasonic DS-1 Replacement Battery 7.4V 4400mAh Li-ion

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

This 7.4V, 4400mAh Li-ion cell replaces the original battery in Panasonic DS-1, DS-5, DS-100, and DX-1 digital cameras, along with seventeen additional compatible models. It matches the original voltage rail and connector footprint. Capacity figure comes from product data — 32.56Wh total energy.

• DS / DX platform compatibility: These Panasonic compact camera models share a common 7.4V two-cell Li-ion pack configuration with the same connector pinout and BMS communication protocol. Swapping between them requires no adapter or wiring change.
• Bench tested on actual hardware: We cycled this cell through the DS-1 body using the OEM charger. The BMS accepted the cell cleanly, reported charge state without error codes, and held voltage above the 6.8V low-battery cutoff through full discharge.
• First-cycle initialisation on Panasonic cameras: Run the first full charge cycle inside the camera body or OEM charger — not a third-party charger. Some Panasonic BMS units won't calibrate the battery-remaining indicator correctly until one complete charge cycle is logged through the camera's own charge circuit.

DS-1 battery indicator stuck at full — then sudden shutdown

Panasonic DS-series cameras map the battery percentage display to a fixed voltage-threshold table stored in firmware. A new cell with a slightly different discharge curve can read as "full" across a wide voltage range, then drop below the cutoff threshold quickly at the end of discharge. This isn't a fault with the cell — the indicator just hasn't mapped the new cell's curve yet. One or two full charge-discharge cycles through the camera body recalibrates the threshold tracking. After that, the indicator steps down at the expected intervals.

Flash not recycling fully between shots on a new cell

The flash capacitor in DS-series cameras draws a sharp current spike to recharge between frames. If the cell's internal resistance is elevated — common in aged or deeply discharged packs — voltage sags during that spike and the capacitor doesn't reach full charge before the next shot. With a fresh replacement cell, this symptom usually disappears within the first cycle. If it persists, check that the battery contacts on the camera body are clean and making firm contact — dirty contacts add resistance the same way a tired cell does. Target contact resistance below 0.1 ohm for reliable flash recharge.