{"product_id":"casio-qv-r3-replacement-battery-37v-1050mah-li-ion","title":"Casio NP-30 QV-R3 Replacement Battery 3.7V 1050mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCasio QV-R3 \/ QV-R4 — 3.7V Li-ion Replacement Battery (NP-30)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1050mAh Li-ion cell replaces the OEM NP-30 and NP-30DBA batteries in the Casio QV-R3 and QV-R4 digital cameras. It fits the same slot and connector as the original and delivers the same voltage rail the camera's processor and image sensor expect. Capacity is rated at 3.89Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQV-R3 and QV-R4 compatibility:\u003c\/strong\u003e\n    Both models share the same NP-30 battery format, voltage requirement, and BMS handshake protocol. One cell works across both bodies 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 a QV-R3 body. The BMS accepted the cell on first insertion after one full charge via the OEM charger, and battery-remaining readout stabilised within two cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle protocol for QV-R3 and QV-R4:\u003c\/strong\u003e\n    Run the first full charge inside the camera body using the OEM charging cable — not a third-party charger. The QV-R3 BMS maps the battery percentage display against a calibration pass it performs during that first in-body charge cycle. Skipping this step causes erratic percentage readings early in the cell's life.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the QV-R3 battery percentage display jumps after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe QV-R3 uses a voltage-threshold system to estimate remaining charge rather than a coulomb counter. A new cell has a slightly different discharge curve shape than an aged OEM cell, so the camera's thresholds map incorrectly at first. This causes the percentage indicator to jump — often from 80% to 20% with no apparent drain. Running two full charge-discharge cycles through the camera body corrects the mapping. After that, the readout tracks consistently.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCamera showing a dead battery icon immediately on a charged replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage sits at or just below the camera's minimum recognition threshold — typically under 3.0V — after storage. A replacement cell shipped in a low-storage-voltage state can trigger the dead battery icon even though the cell is not faulty. Connect the battery to the OEM charger and allow a full charge cycle before re-inserting it. If the camera accepts the cell and the icon clears, the cell is fine; the issue was entry voltage, not cell failure.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333909741658,"sku":"BWCS-NP60FU-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333909774426,"sku":"BWCS-NP60FU-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333909807194,"sku":"BWCS-NP60FU-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NP60FU-1.webp?v=1778213591","url":"https:\/\/batteryweb.com\/products\/casio-qv-r3-replacement-battery-37v-1050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}