{"product_id":"sony-fdr-ax40-replacement-battery-73v-3050mah-li-ion","title":"Sony NP-FV100A Replacement Battery 7.3V 3050mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSony FDR-AX40 \/ FDR-AX45 Series — 7.3V Li-ion Replacement Battery (NP-FV100A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.3V, 3050mAh Li-ion replacement for the Sony NP-FV100A battery pack. It fits the FDR-AX40, FDR-AX45, FDR-AX60, HDR-CX625, and nine additional Sony camcorder models. Slot it into the same battery bay as the original — same connector, same form factor.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFDR-AX \/ HDR-CX platform fit:\u003c\/strong\u003e\n    These camcorder lines share the NP-FV series battery interface — same 7.3V rail, same three-pin connector, and the same BMS handshake protocol. A single cell covers the full range without any adapter or modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on an FDR-AX40 body. The BMS accepted the cell on first insert, reported charge status correctly, and held voltage under sustained 4K recording load without triggering a low-voltage cutoff prematurely.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use charge cycle on the FDR-AX40:\u003c\/strong\u003e\n    Seat the battery in the camera body and run a full charge cycle through the camera itself before shooting. Sony's BMS maps the discharge curve during that first in-body charge — skipping it can cause the remaining-battery indicator to read inaccurately for the first few sessions.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FDR-AX40 drains faster under 4K with image stabilisation active\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003e4K recording on the FDR-AX40 runs the sensor, processor, and Balanced Optical SteadyShot (BOSS) stabilisation simultaneously. That combination pulls significantly more current than standard HD recording with stabilisation off. A cell at 3050mAh is rated at a steady draw — real-world 4K with BOSS active spikes current demand beyond that baseline. If the camera feels warm and the battery indicator drops faster than expected, stabilisation mode and recording resolution are the first variables to check.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBattery percentage jumping erratically on the FDR-AX40 display\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the camera's indicator hasn't yet mapped the new cell's discharge curve. The Sony BMS uses voltage thresholds calibrated to the OEM cell — a replacement cell may discharge along a slightly different curve, causing the percentage to skip or stall at certain points. It typically self-corrects after two or three full charge-discharge cycles. Run the battery down to the auto-shutoff point and recharge fully each time — by the third cycle the indicator should track steadily.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333627248730,"sku":"BWCS-SDX600MX-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333627281498,"sku":"BWCS-SDX600MX-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333627314266,"sku":"BWCS-SDX600MX-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDX600MX-1.webp?v=1778212994","url":"https:\/\/batteryweb.com\/products\/sony-fdr-ax40-replacement-battery-73v-3050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}