{"product_id":"samsung-galaxy-mega-58-replacement-battery-38v-2600mah-li-ion","title":"Samsung Galaxy Mega 5.8 B650AE Replacement Battery 3.8V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSamsung Galaxy Mega 5.8 \/ GT-I9150 — 3.8V Li-ion Replacement Battery (B650AE)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 2600mAh Li-ion cell replacing the OEM B650AE battery in the Samsung Galaxy Mega 5.8 and Galaxy Mega Duos. It fits GT-I9150 and GT-I9152 variants along with 17 additional model numbers sharing the same battery bay and connector. If the original cell is swollen, draining fast, or not charging past a low percentage, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGT-I9150 and GT-I9152 compatibility:\u003c\/strong\u003e\n    Both the single-SIM Mega 5.8 and the Duos dual-SIM variant use the same B650AE footprint — same 63.05 × 56.82 × 5.25mm cell, same three-tab connector, same BMS pinout. No adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the cell through charge and discharge cycles on a GT-I9150 unit. The BMS accepted charge current from the device's charge IC without fault flags. Capacity read within expected tolerance of the rated 2600mAh.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    Disable fast charging in settings for the first full discharge-charge cycle after installation. The fuel gauge IC on the Mega 5.8 was calibrated to the old cell's discharge curve — letting it recalibrate against the new cell under a standard charge rate prevents erratic percentage readings from the first day.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Galaxy Mega 5.8\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when an aged cell can no longer hold voltage under the combined load of the large 5.8-inch display and the modem radio. The phone's power management IC sees the voltage drop below its cutoff threshold — even though the fuel gauge still shows charge remaining. It is a voltage cliff, not a capacity problem. A new cell with lower internal resistance sustains voltage under that combined load, pushing the actual cutoff point back toward 0% where it belongs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after sitting in storage with a flat battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the replacement or old cell discharged below roughly 2.5V per cell during storage, the BMS enters a lockout state and blocks normal charge current. Plug the phone into a charger and leave it connected for 20–30 minutes without pressing the power button — the charge IC will trickle current into the cell until it crosses the BMS re-enable threshold. Once voltage recovers above that threshold, the phone will boot normally. If it still won't respond after 30 minutes, check the charger is delivering at least 5V with a multimeter at the cable tip.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404320014426,"sku":"BWCS-SMP709XL-1","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404320047194,"sku":"BWCS-SMP709XL-2","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404320079962,"sku":"BWCS-SMP709XL-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMP709XL-1.webp?v=1779369735","url":"https:\/\/batteryweb.com\/products\/samsung-galaxy-mega-58-replacement-battery-38v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}