{"product_id":"panasonic-hdc-sd9-replacement-battery-74v-750mah-li-ion","title":"Panasonic VW-VBG070 HDC-SD9 Camcorder Replacement Battery 7.4V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic HDC-SD9 \/ HDC-HS9 Series — 7.4V Li-ion Replacement Battery (VW-VBG070)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 750mAh (5.55Wh) lithium-ion cell replaces the OEM VW-VBG070 battery in Panasonic HDC-series camcorders. It fits the HDC-SD9, HDC-HS9, HDC-SD5, HDC-SD1, and over 32 additional models in the same family. The cell matches the original voltage rail, connector pinout, and BMS communication protocol.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHDC-SD9 \/ HDC-HS9 platform fit:\u003c\/strong\u003e\n    These models share the same battery bay, voltage rail, and three-pin BMS handshake. One cell covers the full range without adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on an HDC-SD9 body. The BMS handshake completed on first connection, and the camera reported battery status without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge cycle on the HDC-SD9:\u003c\/strong\u003e\n    Run the first full charge inside the camcorder body or the OEM charger — not a third-party multi-bay unit. Some HDC-series bodies require an in-body charge cycle before the battery-remaining indicator maps correctly to the new cell's discharge curve.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the HDC-SD9 shows a dead battery indicator on a partially charged replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe HDC-SD9 maps its battery-remaining display against a stored voltage-threshold curve calibrated to the original cell. A new replacement cell has a slightly different discharge curve, especially in the mid-range. The camera reads a voltage point on the new curve and maps it to the wrong percentage on the old one. One full in-body charge cycle from zero lets the BMS re-calibrate against the new cell and the indicator corrects itself.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically on the HDC-SD9 display\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eErratic percentage readings happen when the camera's fuel gauge loses its reference point — usually after a swap from a deeply discharged original cell to a new one. The BMS hasn't yet mapped the new cell's resting voltage to a reliable state-of-charge estimate. Discharge the replacement cell fully in the camera, then charge it to 100% without interruption. After one complete cycle, the percentage display stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333810061402,"sku":"BWCS-VBG070-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333810094170,"sku":"BWCS-VBG070-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333810126938,"sku":"BWCS-VBG070-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VBG070-1.webp?v=1778213259","url":"https:\/\/batteryweb.com\/products\/panasonic-hdc-sd9-replacement-battery-74v-750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}