{"product_id":"hitachi-aquarius-series-replacement-battery-108v-6600mah-li-ion","title":"Hitachi Aquarius 10.8V Laptop Compatible Battery 6600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHitachi Aquarius Series — 10.8V Li-ion Replacement Battery (DR202 \/ ME202BB \/ NL2020)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 6600mAh (71.28Wh) Li-ion battery for the Hitachi Aquarius, Athena, Flora-230, and Flora-270 series notebooks. It replaces OEM part numbers DR202, EMC36, ME202BB, NL2020, and SMP02. When the original cell degrades and the laptop can no longer hold a charge away from AC power, this cell restores portable operation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAquarius and Flora platform fit:\u003c\/strong\u003e\n    These Hitachi notebook lines share the same 10.8V three-cell-series voltage rail, connector pinout, and BMS communication protocol. One cell covers all listed models without modification.\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 Hitachi Aquarius chassis. The BMS handshook correctly, charge current ramped as expected, and top-of-charge termination triggered cleanly at full capacity.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration after install:\u003c\/strong\u003e\n    After fitting this cell, 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 after every cell swap on these Hitachi notebooks.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting poor battery health immediately after fitting a new cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Hitachi Aquarius BIOS reads health data stored in the battery's EEPROM. When a new cell arrives, its EEPROM contains factory defaults that don't match the laptop's discharge history, so the BIOS flags it as degraded. This is not a fault with the replacement cell. Running a full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the battery learn cycle and rewrites the health register. After one or two complete cycles, the BIOS health indicator normalises.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shuts down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC hasn't yet calibrated against the new cell's actual voltage curve. The reported percentage doesn't match real cell voltage, so the laptop hits the low-voltage cutoff while the display still shows charge remaining. It is not a defective battery. Force a full discharge to hibernate, let the system cut off on its own, then charge to 100% without interruption — repeat twice. After two full calibration cycles, the OS fuel gauge tracks accurately and shutdown at false 25% stops.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410838519898,"sku":"BWCS-SP500HB-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43410838552666,"sku":"BWCS-SP500HB-2","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43410838585434,"sku":"BWCS-SP500HB-3","price":114.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SP500HB-1.webp?v=1779581321","url":"https:\/\/batteryweb.com\/products\/hitachi-aquarius-series-replacement-battery-108v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}