{"product_id":"nightstick-xpr-5522gmx-replacement-battery-37v-2600mah-li-ion","title":"Nightstick XPR-5522GMX Replacement Battery 3.7V 2600mAh","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 3.7V 2600mAh Li-ion cell replaces the OEM 5522-BATT in the Nightstick XPR-5522GMX dual-light tactical flashlight. The XPR-5522GMX combines a high-intensity LED beam with a red warning light, drawing variable current depending on which mode and output level is active. Capacity figure is 2600mAh (9.62Wh) as specified in the product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eXPR-5522GMX platform fit:\u003c\/strong\u003e\n    The 5522-BATT cell is specific to the XPR-5522GMX's internal bay dimensions and connector orientation. The flashlight's driver board reads cell voltage directly to manage output stepping — any cell outside the correct voltage range causes the driver to drop output early or refuse to enter turbo mode at all.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full discharge at high-draw loads and confirmed the BMS held voltage above the driver's brownout threshold through multiple mode transitions. The protection circuit cut cleanly at low-voltage limit without tripping mid-cycle on standard or strobe modes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eTurbo mode draw management:\u003c\/strong\u003e\n    Turbo mode on the XPR-5522GMX pulls significantly higher current than standard or low modes. After heavy turbo use, allow the cell to cool before recharging — charging a thermally stressed Li-ion cell accelerates capacity fade over subsequent cycles.\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 output before the indicator signals low\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe XPR-5522GMX's driver uses a brownout protection threshold that sits above the cell's actual low-voltage cutoff. When cell voltage drops under sustained high-draw output, the driver reduces brightness to protect the LED and cell before the battery indicator triggers. This is intentional driver behaviour, not a cell fault. If the light dims noticeably during turbo use but recovers on a lower mode, the cell voltage is sagging under load — normal as a Li-ion cell ages and internal resistance rises. A fresh replacement cell will hold voltage above that threshold longer across the draw curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFlashlight cycling through modes on its own near end of charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the XPR-5522GMX begins switching modes or flickering without input near the end of a charge cycle, the driver is hitting its brownout threshold repeatedly as the cell voltage hovers at the cutoff edge. The cell isn't failing — the driver is doing exactly what it's programmed to do. Switch the light to a lower output mode manually; this reduces current draw enough to keep voltage stable above the cutoff point. If the behaviour starts occurring earlier in a charge cycle over time, internal resistance in the existing cell has risen — replace the cell and verify the new one holds above 3.5V under load.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377502683226,"sku":"BWCS-NXP552FT-1","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377502715994,"sku":"BWCS-NXP552FT-2","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377502748762,"sku":"BWCS-NXP552FT-3","price":41.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NXP552FT-1.webp?v=1778767205","url":"https:\/\/batteryweb.com\/products\/nightstick-xpr-5522gmx-replacement-battery-37v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}