{"product_id":"hitachi-pc-ab6100a-replacement-battery-96v-4000mah-li-ion","title":"Hitachi PC-AB6100A Replacement Battery 9.6V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHitachi PC-AB6100A — 9.6V Li-ion Replacement Battery (BTP-33A1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V Li-ion replacement battery for the Hitachi PC-AB6100A notebook computer. It carries a 4000mAh (38.4Wh) capacity and slots in to restore portable operation when the original cell has degraded. OEM part number BTP-33A1 confirms fitment before you order.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePC-AB6100A platform fitment:\u003c\/strong\u003e\n    The PC-AB6100A uses a specific 9.6V rail with a BMS handshake tied to the BTP-33A1 part number. The connector pinout and charge-protocol handshake are matched to that OEM spec, so the laptop's charge controller accepts the cell and initiates a normal charge cycle without rejecting it as unknown.\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 PC-AB6100A platform. The BMS negotiated correctly on the first connect, the charge controller stepped through pre-charge, CC, and CV phases cleanly, and the protection circuit tripped at the expected over-discharge threshold without latching the pack.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the PC-AB6100A:\u003c\/strong\u003e\n    After fitting, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This gives the BIOS battery learn cycle a clean reference point against the new cell 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 immediately after fitting the BTP-33A1\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PC-AB6100A BIOS reads health data from EEPROM stored on the original cell. When a new cell goes in, the EEPROM presents fresh cycle-count data that does not match the charge history the BIOS last recorded, so the firmware flags the battery as degraded. This is a data mismatch, not a fault with the replacement cell. Run two full discharge-to-hibernate then full-charge cycles. After the second cycle the BIOS recalibrates its learn table against the new cell and the poor-health warning clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePC-AB6100A shutting down abruptly at 20–30% charge shown on screen\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the cell voltage drops sharply under combined CPU and display load — a voltage cliff where the cell can no longer sustain the rail. The OS fuel gauge IC is still reading a state-of-charge estimate from earlier in the discharge curve, so it shows 20–30% while the actual cell voltage has already collapsed below the BMS cutoff threshold. The fix is a full calibration cycle: discharge to hibernate-cutoff with the screen at full brightness and a CPU load running, then charge to 100% uninterrupted. The fuel gauge IC resets its empty-voltage reference point and the premature shutdown stops. Confirm the pack voltage reads above 10.5V at full charge using a multimeter on the connector before reinstalling.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43410862506074,"sku":"BWCS-AC210NB-1","price":78.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43410862538842,"sku":"BWCS-AC210NB-2","price":92.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43410862571610,"sku":"BWCS-AC210NB-3","price":103.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AC210NB-big.webp?v=1779581356","url":"https:\/\/batteryweb.com\/products\/hitachi-pc-ab6100a-replacement-battery-96v-4000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}