{"product_id":"pelican-3750-replacement-battery-48v-4000mah-ni-mh","title":"Pelican 3750 Replacement Battery 4.8V 4000mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePelican 3750 \/ 3759 — 4.8V Ni-MH Replacement Battery (3750-301-000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V, 4000mAh Ni-MH battery pack built to replace part number 3750-301-000 in the Pelican 3750 and 3759 rechargeable flashlights. These are four-cell sub-C Ni-MH packs wired in series to hit the 4.8V rail the driver circuit expects. Capacity is rated at 4000mAh \/ 19.2Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e3750 and 3759 compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and 4.8V driver voltage rail. The pack slots into either unit without modification — the same BMS and charge termination logic applies to both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the Pelican 3750's onboard charger and confirmed delta-V cutoff triggered correctly at full charge. Current draw under full-beam load matched the OEM spec, and the driver stepped down without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMulti-cell replacement rule:\u003c\/strong\u003e\n    This pack contains four matched sub-C cells. If you're running two packs in rotation, do not mix cells from different batches or age groups. A weaker cell in series draws the rest of the pack down unevenly under high-current draw, accelerating failure in the weakest cell first.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Pelican 3750 steps down to low mode before the battery indicator trips\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 3750's driver circuit monitors pack voltage continuously, not just at the indicator threshold. When voltage sags under high-beam current draw, the driver reduces output to protect the cells before the low-battery indicator has time to register. This is brownout protection — the driver steps the LED down rather than cutting power entirely. It's more visible on older packs because internal resistance rises with cycle count, causing a sharper voltage sag under load. A fresh pack at 4000mAh holds voltage flatter across the discharge curve.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack won't hold charge after sitting unused for several months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day at room temperature. A pack left unused for three to six months can drop below 1.0V per cell — the point where the charger's delta-V detection may not see enough voltage rise to initiate a full charge cycle. Measure each cell individually with a multimeter. Any cell reading below 0.9V needs a slow conditioning charge at 0.1C before returning to normal charge. On the 3750's OEM charger, that means using the trickle mode if available, or an external Ni-MH charger set to 400mA to recover the pack first.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377522868314,"sku":"BWCS-PEL759FT-1","price":67.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377522901082,"sku":"BWCS-PEL759FT-2","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377522933850,"sku":"BWCS-PEL759FT-3","price":86.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PEL759FT-1.webp?v=1778767222","url":"https:\/\/batteryweb.com\/products\/pelican-3750-replacement-battery-48v-4000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}