{"product_id":"philips-m-640-replacement-battery-6v-2100mah-ni-mh","title":"Philips SBC-5260C Replacement Battery 6V 2100mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips M-640 \/ M-660 \/ M-670 — 6V Ni-MH Replacement Battery (SBC-5260C)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 2100mAh Ni-MH replacement battery for the Philips M-640, M-660, and M-670 cameras. It replaces OEM part numbers SBC-5260C, SBC-5261C, and SBC5263. The cell matches the original voltage rail and physical form factor for a direct fit in the battery compartment.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM-640, M-660, and M-670 compatibility:\u003c\/strong\u003e\n    All three models share the same battery bay geometry, 6V operating voltage, and connector pinout. One cell covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the M-640 platform. The BMS accepted the cell on the first charge cycle and reported charge state without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle initialisation on the M-640:\u003c\/strong\u003e\n    Run the first charge cycle inside the camera body or the OEM Philips charger rather than a generic third-party unit. Some Philips camera BMS circuits need to complete one supervised 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\"\u003eDead battery indicator on the M-640 with a partially charged replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells have a flatter discharge curve than Li-ion, and the M-640's fuel gauge is calibrated against the original cell's specific curve parameters. A new replacement cell that hasn't completed an initial charge cycle can read as empty even when it holds usable charge. The BMS maps voltage thresholds differently until it has seen a full charge-to-discharge cycle. Run one complete charge cycle in the camera body before shooting, and the indicator will track the actual state of charge accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically on the M-640 display\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the percentage readout skips in large steps or drops suddenly then recovers, the camera's voltage-threshold table hasn't yet calibrated to the replacement cell's discharge curve. This is a calibration state, not a fault with the cell. Discharge the battery fully through normal shooting until the camera shuts off, then complete a full uninterrupted charge to 6V. After that conditioning cycle, the display steps smoothly across the charge range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333885526106,"sku":"BWCS-PDHV20-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333885558874,"sku":"BWCS-PDHV20-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333885591642,"sku":"BWCS-PDHV20-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PDHV20-1.webp?v=1778213555","url":"https:\/\/batteryweb.com\/products\/philips-m-640-replacement-battery-6v-2100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}