{"product_id":"acer-travelmate-p2-tmp215-52-59aj-replacement-battery-1125v-3700mah-li-polymer","title":"Acer TravelMate P2 Replacement Battery 11.25V 3700mAh AP19B8K","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAcer TravelMate P2 TMP215-52-59AJ — 11.25V Li-Polymer Replacement Battery (AP19B8K)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.25V, 3700mAh (41.63Wh) Li-Polymer replacement battery for the Acer TravelMate P2 TMP215-52-59AJ and a wide range of Acer TravelMate, Aspire, and Swift 3 notebooks. It replaces OEM parts AP19B8K, KT00304013, KT0030G022, and AP18C4K. The cell slots directly into the same bay used by the original Acer factory battery.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTravelMate P2 and Aspire A-series compatibility:\u003c\/strong\u003e\n    These models share a common 11.25V three-cell architecture with the same physical connector and BMS handshake protocol. The AP19B8K part number spans multiple chassis variants — TMP215, TMP214, A315, and SF314 — because Acer standardised the battery interface across this product generation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a TMP215-52 chassis and confirmed the BMS initialised correctly, charge current ramped as expected through CC\/CV phases, and the protection circuit tripped at the correct low-voltage cutoff under load. No false over-temperature flags were triggered during the full charge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle after installation:\u003c\/strong\u003e\n    After fitting this battery, run the laptop on battery power until it hibernates at low-charge cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell, clearing the inaccurate health warning that almost always appears after a cell swap on TravelMate hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TravelMate P2 shuts down at 20–30% after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TMP215 BIOS tracks battery voltage curves from the previous cell and uses that history to predict remaining capacity. After a swap, the fuel gauge IC has no calibration data for the new cell's discharge curve. Under combined CPU and display load, the new cell hits a voltage cliff faster than the old curve predicts, triggering an emergency shutdown even though the state-of-charge indicator still shows charge remaining. Running two full discharge-to-hibernate and full-recharge cycles recalibrates the fuel gauge IC against the actual chemistry of the new cell and eliminates the premature cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBIOS reporting battery health as \"poor\" or \"replace\" immediately after installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the BIOS reads health data from the battery's EEPROM, which on a new cell contains factory default values that don't match the previous battery's learned parameters. The system interprets mismatched EEPROM data as a degraded or unknown cell and flags it accordingly. This is not a fault with the replacement battery. Boot into the Acer BIOS, navigate to the battery calibration utility if present, or simply complete one full discharge-hibernate-recharge cycle — the BIOS will rewrite its health baseline from 100% charged state and clear the warning.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409582555226,"sku":"BWCS-ACP715NB-1","price":69.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409582587994,"sku":"BWCS-ACP715NB-2","price":81.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409582620762,"sku":"BWCS-ACP715NB-3","price":90.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ACP715NB-1.webp?v=1779580059","url":"https:\/\/batteryweb.com\/products\/acer-travelmate-p2-tmp215-52-59aj-replacement-battery-1125v-3700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}