{"product_id":"scangrip-minimag-cob-led-replacement-battery-37v-1100mah-li-ion","title":"SCANGRIP MiniMag COB LED 3.7V Replacement Battery 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSCANGRIP MiniMag COB LED — 3.7V Li-ion Replacement Battery (03.5380)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1100mAh Li-ion replacement battery for the SCANGRIP MiniMag COB LED inspection flashlight (03.5403). It slots into the same cell bay as the factory unit and connects to the same charging circuit. Use this when the original cell no longer holds enough charge to sustain full output during an inspection shift.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMiniMag COB LED fit (03.5403):\u003c\/strong\u003e\n    The MiniMag platform runs a single-cell 3.7V Li-ion configuration. The driver pulls current directly from this cell through a constant-current circuit, so voltage and physical dimensions both have to match — this cell does on both counts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the MiniMag's onboard charging circuit and confirmed the BMS accepted the charge cycle without fault flags. Cell voltage settled at 4.18V at end of charge, within spec for the driver's input range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCOB driver and cell voltage:\u003c\/strong\u003e\n    The MiniMag's COB driver steps output down once cell voltage drops below roughly 3.2V. Run the flashlight until it dims noticeably before charging — frequent top-up charges from high state-of-charge add unnecessary charge cycles to a small-capacity cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MiniMag COB dims well before the battery indicator triggers\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MiniMag's COB driver uses brownout protection — it steps down output current before the battery indicator registers low. This is intentional. The driver sacrifices brightness to keep cell voltage above the BMS cutoff threshold, which protects the cell from deep discharge damage. You'll see a visible drop in light output while the indicator still shows green or mid-level. That step-down is your actual low-battery signal on this light.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eNew battery charged full but flashlight output still looks weak\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell shipped in storage state typically arrives between 3.5V and 3.7V — enough for the light to power on, but below the full 4.2V the driver expects for peak output. The COB stage runs at reduced brightness until the cell reaches full charge voltage. Seat the battery, connect the MiniMag to its USB charge cable, and charge until the indicator shows complete. Confirm cell voltage is at or above 4.1V before drawing conclusions about output.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377491116122,"sku":"BWCS-SGR353FT-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377491148890,"sku":"BWCS-SGR353FT-2","price":45.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377491181658,"sku":"BWCS-SGR353FT-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SGR353FT-1.webp?v=1778767172","url":"https:\/\/batteryweb.com\/products\/scangrip-minimag-cob-led-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}