{"product_id":"mегафон-sp-a10-replacement-battery-37v-1750mah-li-ion","title":"Mегафон SP-A10 Replacement Battery 3.7V 1750mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMегафон SP-A10 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1750mAh Li-ion cell replaces the original battery in the Mегафон SP-A10 smartphone. It fits the SP-A10 directly and matches the stock voltage and physical dimensions (64.60 × 43.95 × 5.10mm). Capacity is rated at 6.48Wh — identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSP-A10 fitment:\u003c\/strong\u003e\n    The SP-A10 uses a removable Li-ion cell on a 3.7V rail with a standard three-contact connector. This cell matches that connector pinout, voltage, and physical footprint — no trimming or adapter needed.\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 the SP-A10 platform. The BMS accepted the cell without error flags, and charge termination fired correctly at 4.2V.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before it starts reporting percentages to the OS — skipping this step causes erratic percentage readings for the first few days.\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 SP-A10 after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a discharge curve the fuel gauge IC has never seen before. The IC — calibrated to the old, degraded cell — misreads the new cell's state of charge and reports 20–30% when the actual cell voltage is already near the BMS cutoff threshold. Under load from the modem or display, voltage sags below 3.2V and the BMS shuts the phone down to protect the cell. One full discharge-charge cycle resets the coulomb counter and corrects the curve mapping. After that cycle, shutdowns at false percentages stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSP-A10 not powering on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the replacement cell dropped below 2.5V before installation, the BMS enters lockout mode and blocks current flow to protect the cell from damage. The phone will not respond to the power button or show a charging indicator. Connect the phone to a low-current charger — 5V\/0.5A via USB — and leave it for 15–20 minutes. Once the cell climbs above 2.7V, the BMS releases lockout and normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404333023322,"sku":"BWCS-OT995XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404333056090,"sku":"BWCS-OT995XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404333088858,"sku":"BWCS-OT995XL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OT995XL-1.webp?v=1779369779","url":"https:\/\/batteryweb.com\/products\/m%d0%b5%d0%b3%d0%b0%d1%84%d0%be%d0%bd-sp-a10-replacement-battery-37v-1750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}