{"product_id":"sigma-dp1q-replacement-battery-74v-800mah-li-ion","title":"Sigma BP-51 Compatible Battery DP1Q 7.4V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSigma DP1Q \/ DP2Q \/ DP3Q — 7.4V Li-ion Replacement Battery (BP-51)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 800mAh Li-ion cell built to the BP-51 specification. It fits the Sigma DP1Q, DP2Q, and DP3Q compact cameras. Slide it into the same battery compartment as the original and it connects to the same BMS handshake points.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDP Quattro series fit:\u003c\/strong\u003e\n    The DP1Q, DP2Q, and DP3Q share the same battery bay geometry and the same 7.4V power rail. One BP-51 cell covers all three bodies without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the Sigma BMS authentication cycle and confirmed the charge circuit accepted it without rejection flags. The protection board responded correctly to both low-voltage cutoff and overcharge thresholds.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on the Quattro body:\u003c\/strong\u003e\n    Insert this cell and run one full charge cycle through the camera body or OEM charger before your first shoot. Sigma's battery-remaining indicator maps voltage thresholds to shot-count estimates — it needs one complete cycle from this specific cell's discharge curve to display an accurate reading.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DP Quattro body shows a dead-battery icon on a partially charged replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Quattro's battery indicator does not read raw voltage in a simple linear way. It compares the incoming voltage to a stored discharge curve from the last recognised cell. A new BP-51 cell with no stored history can register as depleted even at 7.2V because the camera has no reference curve to map it against. Run one full charge cycle — from empty to 8.4V — inside the camera or OEM charger. After that cycle, the body stores the new cell's profile and the indicator reads accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping between shots during a shoot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the camera's fuel gauge samples voltage during high-current events — autofocus motor drive, sensor readout, and the Foveon X3 processing load all spike current draw simultaneously. Voltage sags briefly under that load, and the indicator interprets the sag as a capacity drop. It then corrects upward when current draw falls between shots. This is a display artefact, not a fault with the cell. If the jumps are large and persistent rather than settling, check resting voltage with a multimeter — a healthy cell at 50% charge sits at approximately 7.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333807603802,"sku":"BWCS-BLC12MC-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333807636570,"sku":"BWCS-BLC12MC-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333807669338,"sku":"BWCS-BLC12MC-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLC12MC-1.webp?v=1778213125","url":"https:\/\/batteryweb.com\/products\/sigma-dp1q-replacement-battery-74v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}