{"product_id":"maxdata-eco-4500-replacement-battery-108v-4400mah-li-ion","title":"MaxData ECO 4500 Replacement Battery 10.8V 4400mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMaxData ECO 4500 Series — 10.8V Li-ion Replacement Battery (L50-3S4400-S1S5)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 4400mAh (47.52Wh) lithium-ion battery for the MaxData ECO 4500, ECO 4500A, ECO 4500I, and ECO 4500IW laptops. It slots into the same bay as the original cell and uses the same connector and BMS communication protocol. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eECO 4500 series compatibility:\u003c\/strong\u003e\n    All ECO 4500 variants share the same 10.8V three-cell architecture, connector pinout, and BMS handshake protocol — that is why a single cell covers the full model range from standard to IW. The EEPROM embedded in this pack carries the correct chemistry and Wh identifiers for the platform.\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 the ECO 4500 platform. The BMS negotiated correctly at first insertion, charge current ramped as expected, and the protection circuit tripped cleanly at the low-voltage cutoff without false shutdowns.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the ECO 4500:\u003c\/strong\u003e\n    After fitting this battery, run the laptop on battery power until it hibernates at cutoff, then charge uninterrupted to 100% before using it again. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity and clears the false health warning that almost always appears after a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eECO 4500 shutting down at 20–30% charge remaining\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the laptop's fuel gauge IC has calibrated its cutoff threshold against the old, degraded cell — not the new one. Under full CPU and display load, the voltage on the new cell drops faster than the IC expects, triggering a premature shutdown before the true reserve is exhausted. The fix is a full discharge-to-hibernate followed by a single uninterrupted charge to 100%. After two or three full cycles the fuel gauge IC recalibrates against the new cell's actual voltage curve and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting wrong Wh rating after battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MaxData ECO 4500 BIOS reads Wh data from the EEPROM embedded in the battery pack, not from a live measurement. If the displayed Wh figure differs from 47.52Wh shown in system information, the BIOS has not yet completed a full learn cycle against the new cell's EEPROM. Run one complete discharge to hibernate cutoff and one full recharge without interruption. After that cycle, the BIOS should read the correct 47.52Wh figure from the pack's EEPROM data.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410818924634,"sku":"BWCS-UNL50NB-1","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410818957402,"sku":"BWCS-UNL50NB-2","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410818990170,"sku":"BWCS-UNL50NB-3","price":112.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-UNL50NB-1.webp?v=1779581212","url":"https:\/\/batteryweb.com\/products\/maxdata-eco-4500-replacement-battery-108v-4400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}