{"product_id":"panasonic-ds-1-replacement-battery-74v-4400mah-li-ion","title":"Panasonic DS-1 Replacement Battery 7.4V 4400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic DS-1 \/ DS-5 \/ DS-100 \/ DX-1 Series — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 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.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDS \/ DX platform compatibility:\u003c\/strong\u003e\n    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.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    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.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle initialisation on Panasonic cameras:\u003c\/strong\u003e\n    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.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDS-1 battery indicator stuck at full — then sudden shutdown\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003ePanasonic 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.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFlash not recycling fully between shots on a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe 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.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333921898586,"sku":"BWCS-F750-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333921931354,"sku":"BWCS-F750-2","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333921964122,"sku":"BWCS-F750-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-F750-1.webp?v=1778213575","url":"https:\/\/batteryweb.com\/products\/panasonic-ds-1-replacement-battery-74v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}