{"product_id":"mustek-dc300-replacement-battery-37v-1000mah-li-ion","title":"Mustek DC300 Replacement Battery 3.7V 1000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMustek DC300 \/ DC500 Series — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1000mAh Li-ion cell for the Mustek DC300, DC500, DC500T, DC-500T, and compatible models in the same series. It fits cameras sharing the same battery bay dimensions and voltage rail. Capacity is 1000mAh (3.7Wh), matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDC300 \/ DC500 series compatibility:\u003c\/strong\u003e\n    These models share the same physical bay (52.95 × 33.07 × 8.01mm), voltage rail, and connector pinout. A single 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 compatible hardware and confirmed the protection circuit trips correctly at low-voltage cutoff. The BMS held within expected thresholds across multiple cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    After fitting a new cell, run one full discharge to camera shutoff, then charge uninterrupted to 100% before use. The camera's fuel gauge IC was calibrated to the old cell's discharge curve — skipping this step produces inaccurate percentage readings from the first shot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden camera shutoff with charge still showing on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-ion cell has a steeper voltage discharge curve than a broken-in cell. When the camera draws a burst of current — writing a large file or firing the flash — voltage sags sharply. If the camera's low-voltage cutoff threshold sits higher than the sag floor, it reads the drop as a dead cell and cuts power. This is normal behaviour on the first few cycles. After two or three full discharge-charge cycles, the cell's internal resistance drops and voltage sag under load stabilises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage stuck or jumping after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe camera stores a charge curve model in firmware tied to the old cell's impedance profile. A new cell has different internal resistance, so the coulomb counter misreads state-of-charge and reports erratic percentages. The fix is one full uninterrupted charge to cutoff, followed by a discharge to camera shutoff. After that cycle, the fuel gauge IC resets its reference points against the new cell and percentage tracking stabilises near 3.7V nominal.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409481138266,"sku":"BWCS-NKB2MX-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409481171034,"sku":"BWCS-NKB2MX-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409481203802,"sku":"BWCS-NKB2MX-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NKB2MX_1.webp?v=1778213576","url":"https:\/\/batteryweb.com\/products\/mustek-dc300-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}