{"product_id":"wedge-tech-powerbook-5cd-replacement-battery-12v-3800mah-ni-mh","title":"Wedge Tech DR36 PowerBook 5CD Replacement Battery 12V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWedge Tech PowerBook 5CD — 12V Ni-MH Replacement Battery (DR36)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 3800mAh Ni-MH replacement battery for the Apple PowerBook 5CD notebook computer. It fits directly in place of OEM part DR36 and DR36S. Capacity is rated at 45.6Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePowerBook 5CD compatibility:\u003c\/strong\u003e\n    The 5CD uses a dedicated 12V Ni-MH pack with a fixed connector and BMS handshake tied to the OEM DR36 form factor. This cell matches that voltage rail and connector pinout, so the logic board recognises it without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on a PowerBook 5CD chassis. The BMS accepted the cell without fault codes, and charge termination triggered correctly at full capacity with no overrun.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning for Ni-MH cells:\u003c\/strong\u003e\n    After installing, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. Ni-MH cells in this platform require that cycle to reset the BIOS battery learn cycle and clear the inaccurate health warning that appears after every cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PowerBook 5CD shuts down at 20–30% remaining after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe PowerBook 5CD fuel gauge IC was calibrated against the original cell's discharge curve. A new Ni-MH cell has a slightly different voltage-to-capacity curve, so the IC miscalculates the remaining charge. Under combined CPU and display load, the cell hits a voltage cliff that the gauge didn't predict. Running one full discharge-to-hibernate cycle followed by a full uninterrupted charge gives the fuel gauge IC the data it needs to recalibrate against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as poor immediately after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BIOS stores battery health data in EEPROM tied to the original cell's cycle history. When a new cell goes in, that stored data doesn't match the new cell's state, so the BIOS flags it as degraded. This is a data mismatch, not a fault with the replacement cell. Complete one full discharge-to-hibernate cycle and one full uninterrupted charge — the BIOS battery learn cycle will rewrite the EEPROM and the health warning will clear.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410856443994,"sku":"BWCS-DR36HB-1","price":89.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410856476762,"sku":"BWCS-DR36HB-2","price":105.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410856509530,"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\/wedge-tech-powerbook-5cd-replacement-battery-12v-3800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}