{"product_id":"megafon-sp-a10-replacement-battery-37v-1750mah-li-ion","title":"MegaFon SP-A10 Replacement Battery 3.7V 1750mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMegaFon 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 MegaFon SP-A10 smartphone. It fits directly into the SP-A10 chassis using the same connector and cell footprint as the factory unit. Capacity figures come from the product data: 1750mAh \/ 6.48Wh.\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 3.7V nominal single-cell Li-ion pack with a fixed JST-style connector. This cell matches that voltage rail and connector pinout, so the charge IC and BMS communicate 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 the SP-A10 board. The BMS accepted charge from the device's onboard charge IC without triggering a fault, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first cycle:\u003c\/strong\u003e\n    On first use after installing this cell, run one complete discharge down to auto-shutdown, then charge uninterrupted to 100%. This gives the SP-A10's fuel gauge IC a full reference curve for the new cell before the OS starts reporting state-of-charge to apps.\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  \u003cp class=\"bpw-desc-p\"\u003eA new cell has a slightly different discharge curve than the aged cell the fuel gauge IC was calibrated against. When the SP-A10 hits a steep voltage drop under modem or screen load, the system sees a voltage below the shutdown floor even though the percentage display still reads 20–30%. The phone cuts power to protect the board. One full discharge-to-shutdown and uninterrupted recharge cycle lets the coulomb counter re-anchor its curve to the new cell, and the shutdowns stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSP-A10 showing erratic percentage jumps after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe fuel gauge IC stores the previous cell's discharge model in memory. With a new cell installed, the stored model no longer matches actual cell behaviour, so the reported percentage can jump 10–15 points mid-use or spike unexpectedly on charge. This is not a fault with the replacement cell — it is the IC recalibrating. Let the phone run two complete discharge-charge cycles without interruption, and the percentage display will stabilise.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404335349850,"sku":"BWCS-OT995XL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404335382618,"sku":"BWCS-OT995XL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404335415386,"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\/megafon-sp-a10-replacement-battery-37v-1750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}