{"product_id":"bayco-xpr-9850-replacement-battery-36v-7000mah-ni-mh","title":"Bayco XPR-9850 Replacement Battery 3.6V 7000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBayco XPR-9850 \/ XPR-9860 — 3.6V Ni-MH Replacement Battery (XPR-9850BATT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 7000mAh Ni-MH replacement battery for the Bayco XPR-9850 and XPR-9860 rechargeable flashlights. It slots in as a direct cell replacement when the original pack loses capacity or stops holding charge. Capacity is 25.2Wh — matched to the original specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXPR-9850 and XPR-9860 compatibility:\u003c\/strong\u003e\n    Both models use the same OEM part number (XPR-9850BATT) and share an identical cell format, voltage rail, and connector. One replacement covers either light 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 XPR-9850 driver at full output and stepped down through standard mode. The Ni-MH chemistry held voltage above the driver's brownout threshold through the full discharge curve before the light stepped down.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSingle-cell replacement note:\u003c\/strong\u003e\n    The XPR-9850 runs on one large-format Ni-MH cell rather than a multi-cell pack. When replacing, make sure the contact springs are clean and unobstructed — corrosion on the spring contacts is the most common cause of intermittent connection after a new cell is installed.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFlashlight driver stepping down output before the battery reads low\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe XPR-9850 driver monitors cell voltage continuously and steps output down before the battery indicator triggers. Ni-MH cells have a flatter discharge curve than Li-ion, so the driver hits its brownout threshold while the cell still has usable charge remaining. This is intentional — the driver protects the cell from over-discharge, which permanently reduces Ni-MH capacity. If the light dims unexpectedly, switch to a lower output mode to keep the cell above the 1.0V cutoff and extract the remaining charge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSignificantly shorter output in turbo mode compared to standard mode\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eTurbo mode on the XPR-9850 draws current at a rate far higher than standard or low mode — often five to ten times greater. A 7000mAh Ni-MH cell delivers its rated capacity at moderate draw rates; at turbo-level current, internal resistance causes the cell voltage to sag faster and the driver cuts output sooner. This is a chemistry constraint, not a fault with the replacement cell. To get the most out of a full charge, use turbo in short bursts and drop to standard mode for sustained illumination.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377522311258,"sku":"BWCS-BXR850FT-1","price":80.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377522344026,"sku":"BWCS-BXR850FT-2","price":93.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377522376794,"sku":"BWCS-BXR850FT-3","price":103.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BXR850FT-1.webp?v=1778767205","url":"https:\/\/batteryweb.com\/products\/bayco-xpr-9850-replacement-battery-36v-7000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}