{"product_id":"panasonic-p-10a-replacement-battery-37v-700mah-li-ion","title":"Panasonic P-10A Replacement Battery 3.7V 700mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePanasonic P-10A \/ P-09A \/ P-08A \/ P-07A — 3.7V Li-ion Replacement Battery (P19 \/ AAP29235)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 700mAh Li-ion cell that replaces the factory battery in the Panasonic P-10A, P-09A, P-08A, and P-07A smartphones. It matches the original OEM part numbers P19 and AAP29235. Physical dimensions are 45.20 × 37.75 × 4.21mm — verify yours before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP-07A through P-10A compatibility:\u003c\/strong\u003e\n    These four Panasonic handsets share the same battery bay dimensions, connector pinout, and BMS communication protocol — one cell fits the full run of this smartphone line 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 P-series hardware. The BMS handshake completed on the first cycle, charge termination triggered at the correct cutoff voltage, and no thermal flags were raised during the test.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging for the first complete discharge-charge cycle. The fuel gauge IC needs one full cycle against the new cell's discharge curve before it can report accurate percentage readings. Running a fast-charge current into an uncalibrated cell can skew the coulomb counter further.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the P-10A reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe P-series fuel gauge IC stores a learned discharge curve from the original cell. When you fit a new cell, that stored curve no longer matches the new cell's actual voltage-to-capacity relationship. The phone reads voltage, maps it to the old curve, and outputs an incorrect percentage. One full discharge below 3.4V followed by a complete charge allows the IC to rebuild its reference map against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the modem or display draws a high instantaneous current and the cell voltage drops below the BMS protection threshold faster than the fuel gauge expects. The gauge still shows 20–30% because it hasn't seen that voltage cliff before on this cell. It is not a defective battery — it is an uncalibrated fuel gauge. Complete two full discharge-charge cycles and confirm the cell rests at 3.7V open-circuit before the third charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405095010394,"sku":"BWCS-PAX100SL-1","price":28.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43405095043162,"sku":"BWCS-PAX100SL-2","price":32.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43405095075930,"sku":"BWCS-PAX100SL-3","price":34.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PAX100SL-1.webp?v=1779369969","url":"https:\/\/batteryweb.com\/products\/panasonic-p-10a-replacement-battery-37v-700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}