{"product_id":"streamlight-strion-hpl-flashlight-replacement-battery-37v-3500mah-li-ion","title":"Streamlight Strion HPL 3.7V Replacement Battery 74031","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eStreamlight Strion HPL Flashlight — 3.7V Li-ion Replacement Battery (74031)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 3500mAh Li-ion replacement battery for the Streamlight Strion HPL and Strion LED series flashlights. It fits a wide range of Strion variants including the Strion DS HL and ProTac HL USB. The OEM part numbers covered include 74031, 74032, 74175, and over thirty additional Streamlight references.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStrion and ProTac platform fit:\u003c\/strong\u003e\n    These models share the same cylindrical cell format, 3.7V nominal voltage rail, and proprietary charging contacts. The BMS handshake across this platform is consistent, so one cell format covers the full lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on a Strion HPL body. The BMS engaged cleanly at both ends — no false low-battery cutoff on draw, and charge termination landed within spec at the top of the cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eTurbo mode thermal load:\u003c\/strong\u003e\n    The Strion HPL driver pulls significantly higher current in turbo mode than in standard. Let the cell rest for a few minutes after sustained turbo use before recharging — heat carried into the charger shortens cell life faster than cycle count alone.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eStrion HPL driver stepping down output before the indicator shows low\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Strion HPL's driver has brownout protection built in. When cell voltage drops under high current draw, the driver steps output down before the low-battery indicator triggers — so the light dims visibly while the indicator still reads normal. This is the driver protecting itself, not a faulty cell. It happens earlier with an aged cell because internal resistance is higher, causing a larger voltage sag under load. A fresh 3500mAh cell at full charge will push the step-down point later in the discharge curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCell draining to zero during storage — flashlight dead on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge slowly in storage, and if the cell drops below the BMS deep-discharge threshold — typically around 2.5V — the protection circuit opens and the charger sees a dead load. The Streamlight charger may show no charge activity or a fault light. To recover, place the cell on a Li-ion charger capable of trickle or pre-charge mode at 0.1C until voltage climbs above 3.0V, then resume normal charging. Avoid storing the flashlight with a depleted cell for more than a few weeks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377469390938,"sku":"BWCS-SLX741FT-1","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377469423706,"sku":"BWCS-SLX741FT-2","price":58.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377469456474,"sku":"BWCS-SLX741FT-3","price":64.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SLX741FT-1.webp?v=1778767172","url":"https:\/\/batteryweb.com\/products\/streamlight-strion-hpl-flashlight-replacement-battery-37v-3500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}