{"product_id":"apple-macbook-pro-15-a1398-retina-2015-replacement-battery-1136v-8700mah-li-polymer","title":"Apple MacBook Pro 15\" A1398 Replacement Battery 11.36V 8700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eApple MacBook Pro 15\" A1398 Retina 2015 — 11.36V Li-Polymer Replacement Battery (A1618)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is an 11.36V, 8700mAh (98.83Wh) Li-Polymer battery for the MacBook Pro 15-inch A1398 Retina, 2015 model. It fits machines running the MJLQ2LL\/A and MJLT2LL\/A configurations, as well as the Chinese-market MJLQ2CH\/A and MJLT2CH\/A variants. It also covers select 2013 A1398 Retina builds that share the same battery bay and connector spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eA1398 Retina compatibility across model years:\u003c\/strong\u003e\n    Apple used the A1618 cell across multiple A1398 production runs because the battery bay dimensions, connector pinout, and BMS handshake protocol stayed consistent from late 2013 through mid-2015. Voltage rail and SMBus communication remained unchanged across those configurations.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a 2015 A1398 unit. The SMC recognised the battery immediately, the BMS negotiated charge current without fault, and the fuel gauge IC began tracking cell state from the first cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on macOS:\u003c\/strong\u003e\n    After installation, run the machine on battery until macOS initiates safe sleep at low charge, then charge uninterrupted to 100%. This resets the SMC battery learn cycle and clears the inaccurate health warning that appears in System Information after a cell swap.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy macOS reports poor battery health immediately after swapping the A1618\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MacBook Pro's SMC stores cycle count, full-charge capacity, and health data in EEPROM tied to the old cell. When a new cell installs, that stored data mismatches the new cell's reported values, so macOS flags health as degraded or shows an unexpected wattage in System Report. This is a data mismatch, not a cell fault. Running one full discharge-to-sleep cycle followed by an uninterrupted charge to 100% forces the SMC to rewrite its battery learn table against the new cell. After two to three cycles, System Information should report normal condition and a full-charge capacity close to 98.83Wh.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMacBook Pro A1398 shutting down at 20–30% charge shown on the menu bar\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The IC uses the old cell's voltage-to-capacity mapping, so it miscalculates the remaining charge and triggers an SMC shutdown well before the cell is actually depleted. The fix is a full calibration cycle: discharge to forced sleep, then charge to 100% without interruption. Repeat twice if the cutoff persists — after two complete cycles the fuel gauge IC recalibrates its curve and the reported percentage aligns with actual cell voltage, typically holding stable above 10.8V at shutdown.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43409742692442,"sku":"BWCS-AM1618NB-1","price":146.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43409742725210,"sku":"BWCS-AM1618NB-2","price":169.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43409742757978,"sku":"BWCS-AM1618NB-3","price":185.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AM1618NB-1.webp?v=1779580582","url":"https:\/\/batteryweb.com\/products\/apple-macbook-pro-15-a1398-retina-2015-replacement-battery-1136v-8700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}