{"product_id":"hitachi-vision-plus-5000-replacement-battery-108v-4000mah-ni-mh","title":"Hitachi Vision Plus 5000 BTP-031 Replacement Battery 10.8V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHitachi Vision plus 5000 — 10.8V Ni-MH Replacement Battery (BTP-031)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 10.8V, 4000mAh (43.2Wh) Ni-MH battery pack for the Hitachi Vision plus 5000 notebook. It replaces the original BTP-031 cell when the existing pack has lost charging capacity. Connector and form factor match the original unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVision plus 5000 fitment:\u003c\/strong\u003e\n    The BTP-031 uses a fixed 10.8V rail with a proprietary connector and cell arrangement specific to this chassis. Swapping a different voltage pack or pin-incompatible unit trips the protection circuit and the system will not boot on battery.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on a Vision plus 5000 chassis. The BMS held voltage within spec under CPU and display load, and the charge controller accepted full capacity without flagging an error state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration on the Vision plus 5000:\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 this platform.\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 after fitting the BTP-031\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Vision plus 5000 BIOS reads health data stored in the old cell's EEPROM during its last known state. When a new cell goes in, that EEPROM data is absent or mismatched, so the BIOS immediately flags the pack as degraded. This is not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted full charge forces the BIOS learn cycle to rewrite its reference data against the new cell. After one or two cycles the health indicator updates to reflect actual capacity.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLaptop shutting down while the gauge still shows 20–30% remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells have a steeper voltage drop-off curve under combined CPU and backlight load than the fuel gauge IC expects at that state of charge. When the pack voltage falls below the BMS cutoff threshold — typically around 9.0V under load on a 10.8V Ni-MH pack — the system shuts down instantly regardless of the percentage shown on screen. The fuel gauge IC needs two to three full calibration cycles before its discharge curve model matches the actual cell behaviour. Discharge fully to hibernate-cutoff, then charge to 100% without interruption for each of those cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410860834906,"sku":"BWCS-AC390HB-1","price":86.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410860867674,"sku":"BWCS-AC390HB-2","price":102.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410860900442,"sku":"BWCS-AC390HB-3","price":113.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC390HB-big.webp?v=1779581356","url":"https:\/\/batteryweb.com\/products\/hitachi-vision-plus-5000-replacement-battery-108v-4000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}