{"product_id":"ufo-ds5331-replacement-battery-37v-600mah-li-ion","title":"Sony NP-900 Compatible Battery 3.7V 600mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUFO DS5331 \/ DS5080 \/ DS5332 — 3.7V Li-ion Replacement Battery (NP-900)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 600mAh lithium-ion battery replacing the NP-900 cell in Sony compact digital cameras. It fits the DS5331, DS5080, and DS5332 bodies. Physical dimensions are 43.70 × 31.30 × 7.00mm — match these against your original before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDS5331, DS5080, DS5332 shared platform:\u003c\/strong\u003e\n    These three models use the same NP-900 footprint, connector pinout, and BMS communication protocol. One cell covers all three 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 NP-900 compatible hardware. The BMS accepted the cell without fault flags, and voltage held within spec across the full discharge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle initialisation in the camera body:\u003c\/strong\u003e\n    Run the first full charge from inside the camera body using the OEM charger or USB port — not a third-party external charger. Some camera BMS controllers only map the battery-remaining display correctly after reading a full charge cycle from within the body itself.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSony NP-900 BMS rejecting a third-party cell on first install\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSome Sony compact bodies run an authentication handshake on startup. If a new cell hasn't completed a charge cycle inside the camera, the BMS may flag it as unrecognised and refuse to power the body. This isn't a fault with the cell — it's the controller checking charge history data it hasn't yet written. Insert the battery, connect the camera to its OEM charger, and let it complete one full charge from 0% to 100% before shooting. After that cycle, the body logs the cell and the rejection clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically on the DS5331 display\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe camera's fuel gauge maps voltage thresholds from the original Sony discharge curve. A replacement cell with a slightly different discharge curve causes the percentage indicator to skip or jump — dropping 20% in seconds, then stalling. The cell itself isn't draining faster; the gauge is misreading voltage steps it wasn't calibrated for. Run two full charge-discharge cycles through the camera body to let the BMS recalibrate its threshold table. After two cycles, most DS5331 bodies stabilise the readout within a few percentage points of actual charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333824544858,"sku":"BWCS-NP900-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333824577626,"sku":"BWCS-NP900-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333824610394,"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\/ufo-ds5331-replacement-battery-37v-600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}