{"product_id":"duracell-dr-36-replacement-battery-12v-3800mah-ni-mh","title":"Duracell DR36 Replacement Battery 12V 3800mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDuracell DR-36 \/ DR-36S — 12V Ni-MH Replacement Battery (DR36, NJ1020, SMP36)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 3800mAh (45.6Wh) Ni-MH replacement battery for the Duracell DR-36 and DR-36S notebook computers. It slots into the original battery bay and connects to the same charge controller the factory cell used. Capacity figures come from the product data — not estimates.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDR-36 and DR-36S compatibility:\u003c\/strong\u003e\n    Both models share the same 12V voltage rail, identical connector pinout, and the same BMS handshake sequence. One cell covers both variants — no adapter or wiring modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on a DR-36 unit. The BMS accepted the cell without fault codes, balanced all NiMH cells correctly, and held charge cutoff at the expected voltage ceiling.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap discharge cycle on DR-36 and DR-36S:\u003c\/strong\u003e\n    After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on first boot after a cell swap. Skip this step and the gauge can read off by a significant margin for weeks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DR-36 shuts down at 20–30% remaining after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS fuel gauge IC maps its discharge curve against data stored in EEPROM from the original cell. A new Ni-MH cell has a slightly different internal resistance profile, so the gauge misreads the voltage cliff. When the cell hits roughly 10.5V under combined CPU and display load, the system interprets it as a hard cutoff — even though the gauge shows 20–30% remaining. Running two or three full discharge-to-hibernate cycles recalibrates the fuel gauge IC against the new cell's actual curve and the premature shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor or unknown immediately after fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the BIOS reads health data from EEPROM registers that still hold values from the degraded original cell. The new cell has not yet written its own cycle-count and capacity data to those registers. The \"poor health\" or \"unknown\" flag is a stale read — not a fault with the replacement. Perform one complete battery learn cycle: discharge fully to hibernate-cutoff, then charge to 100% without interruption, and the BIOS will update the EEPROM with accurate data from the new cell.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410855428186,"sku":"BWCS-DR36HB-1","price":89.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410855460954,"sku":"BWCS-DR36HB-2","price":105.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410855493722,"sku":"BWCS-DR36HB-3","price":118.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DR36HB-big.webp?v=1779581376","url":"https:\/\/batteryweb.com\/products\/duracell-dr-36-replacement-battery-12v-3800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}