{"product_id":"aosta-da-5092-replacement-battery-37v-600mah-li-ion","title":"Sony NP-900 Replacement Battery 3.7V 600mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAOSTA DA 5092 Series — 3.7V Li-ion Replacement Battery (NP-900)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 600mAh Li-ion battery built to the NP-900 footprint. It fits the AOSTA DA 5092, DA 5091, DA 5094, and DA 4092 digital cameras. Physical dimensions are 43.70 x 31.30 x 7.00mm — same as the original cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDA 5091 \/ 5092 \/ 5094 \/ 4092 fit group:\u003c\/strong\u003e\n    These four models share the same NP-900 contact layout, voltage rail, and BMS handshake requirements. One replacement cell covers all four 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 the OEM charger and camera body. The BMS accepted the cell on first charge. Voltage held at 3.7V nominal under standard photo capture draw with no cutoff events recorded.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle protocol on NP-900 cameras:\u003c\/strong\u003e\n    Run the first full charge cycle inside the camera body or OEM charger before shooting. Some compact camera BMS systems from this era calibrate the battery-remaining display only after completing one full charge from within the device itself.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCamera showing dead battery indicator on a partially charged replacement cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eEarly 2000s compact camera BMS units map battery percentage against a fixed voltage-discharge curve stored in firmware. A new Li-ion cell has a slightly different discharge curve than a worn original, so the camera reads the voltage and maps it incorrectly at first. The indicator can show empty even when the cell holds a substantial charge. One complete charge-discharge cycle resets the camera's internal reference point, and the indicator typically stabilises after that.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically during a shoot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the camera's voltage threshold map doesn't align with the new cell's discharge curve. The BMS samples terminal voltage and converts it to a percentage, but compact cameras at this voltage class use coarse sampling — often just three or four threshold points. If the new cell drops through two thresholds in quick succession under flash recharge load, the display jumps. Discharge the cell fully, then charge it completely in the OEM charger. After one full cycle the thresholds settle and the readout stabilises.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333825626202,"sku":"BWCS-NP900-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333825658970,"sku":"BWCS-NP900-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333825691738,"sku":"BWCS-NP900-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NP900-1.webp?v=1778213259","url":"https:\/\/batteryweb.com\/products\/aosta-da-5092-replacement-battery-37v-600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}