{"product_id":"avant-s6-replacement-battery-37v-600mah-li-ion","title":"Avant NP-900 Replacement Battery 3.7V 600mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAvant S6 \/ S4 \/ S5 — 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 cell that replaces the NP-900 battery in the Avant S6, S4, and S5 digital cameras. It shares the same footprint and connector as the original cell — 43.70 × 31.30 × 7.00mm. When the original cell no longer holds charge, this cell restores full camera operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eS6, S4, and S5 compatibility:\u003c\/strong\u003e\n    All three models use the same NP-900 form factor, voltage rail, and connector pin-out. One cell works across the entire 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 the S6 body using the OEM charger. The BMS accepted the cell, reported charge state correctly, and held voltage above 3.5V through a standard discharge sequence.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-install charge cycle on the S6:\u003c\/strong\u003e\n    Run the first full charge inside the camera body or OEM charger — not a generic USB adapter. Some camera BMS firmware needs one supervised charge cycle to map the new cell's discharge curve to the battery-remaining indicator accurately.\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  \u003cp class=\"bpw-desc-p\"\u003eThe Avant S6 reads remaining capacity by mapping open-circuit voltage to a lookup table calibrated against the original cell's discharge curve. A new third-party cell may have a slightly different curve, so the camera sees a voltage point it maps to empty — even when the cell still has charge. One full charge-discharge cycle inside the camera body recalibrates the indicator. After that cycle, the percentage display should track the actual charge state within a few percent.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically between shots\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAt 600mAh, the NP-900 cell has a small buffer. Each shot draws a burst of current for shutter actuation, image processing, and LCD refresh. If the indicator jumps — say, 80% to 50% — between shots, the BMS is seeing a momentary voltage sag and recalculating state-of-charge in real time. This usually settles after the first full charge cycle. If it persists past cycle two, check that terminal voltage at full charge reads 4.15–4.20V using a multimeter before re-inserting the cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333825069146,"sku":"BWCS-NP900-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333825101914,"sku":"BWCS-NP900-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333825134682,"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\/avant-s6-replacement-battery-37v-600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}