{"product_id":"nightstick-xpr-5522gmx-replacement-battery-37v-3400mah-li-ion","title":"Nightstick XPR-5522GMX Replacement Battery 3.7V 3400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNightstick XPR-5522GMX — 3.7V Li-ion Replacement Battery (5522-BATT)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 3400mAh Li-ion battery built to fit the Nightstick XPR-5522GMX dual-light rechargeable flashlight. It replaces OEM part number 5522-BATT directly. When the original cell degrades, this swap restores full output across both the main and secondary light heads.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXPR-5522GMX compatibility:\u003c\/strong\u003e\n    The 5522-BATT cell is specific to this dual-head form factor. The physical dimensions — 80.20 × 38.30 × 25.50mm — match the battery bay exactly, and the BMS communicates with the XPR-5522GMX driver circuit to enable mode control and low-voltage protection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, discharge, and all output modes on the XPR-5522GMX. The BMS held the correct cutoff voltage under turbo draw, and the driver stepped down output cleanly at low-cell threshold without tripping a hard shutdown.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSingle-cell care on this light:\u003c\/strong\u003e\n    The XPR-5522GMX runs one cell. If you use a partially depleted spare alongside this new battery at different times without full cycling in between, the driver will see inconsistent voltage on startup and may default to reduced output — always fully charge this cell before first deployment.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the XPR-5522GMX steps down brightness before the low-battery indicator fires\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe XPR-5522GMX driver runs a constant-current circuit that monitors cell voltage continuously. When the cell drops below the driver's brownout threshold — typically around 3.0V under load — the driver cuts current to the LEDs to protect the cell, even if the battery indicator hasn't triggered yet. This is intentional protection behaviour, not a fault. The indicator trips slightly later because it reads resting voltage, not loaded voltage. If the light dims noticeably in turbo before any warning, the cell is near end of charge.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eXPR-5522GMX flickering or cycling between modes near end of charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the cell voltage sags under high-current draw, the driver may oscillate — briefly cutting power, the cell voltage recovers, power resumes, then sags again. This produces a flicker or appears as the light cycling modes on its own. It is not a driver fault or a defective battery. Switch to a lower output mode immediately — this reduces current draw, stops the voltage sag cycle, and lets you finish the task before recharging. Recharge when the cell reaches 3.0V resting.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377502978138,"sku":"BWCS-NXP553FT-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377503010906,"sku":"BWCS-NXP553FT-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377503043674,"sku":"BWCS-NXP553FT-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NXP553FT-1.webp?v=1778767206","url":"https:\/\/batteryweb.com\/products\/nightstick-xpr-5522gmx-replacement-battery-37v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}