{"product_id":"nokia-asha-502-replacement-battery-37v-800mah-li-ion","title":"Nokia Asha 502 BL-5A Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia Asha 502 — 3.7V Li-ion Replacement Battery (BL-5A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 800mAh Li-ion replacement battery for the Nokia Asha 502. It uses OEM part number BL-5A and fits directly into the Asha 502's battery bay. Capacity is rated at 2.96Wh, matching the original cell specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAsha 502 fit:\u003c\/strong\u003e\n    The BL-5A format is specific to the Asha 502 platform — the connector pinout, physical dimensions (46.10 × 39.80 × 5.20mm), and BMS voltage parameters match what the device's charge IC expects at 3.7V nominal.\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 Asha 502 platform. The BMS accepted the charge IC handshake without fault flags, and the cell held voltage through a full discharge cycle without mid-cycle dropout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, run one full discharge down to auto-shutoff before recharging completely. The Asha 502's fuel gauge IC calibrates its coulomb counter against that first full cycle — skipping it causes the percentage readout to drift.\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 Asha 502 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell has a slightly different discharge curve than the aged cell the fuel gauge IC learned over time. When the Asha 502 reports 25% remaining, the actual cell voltage may already be near the cutoff threshold for the modem and display load. The BMS triggers a hard shutdown to protect the cell before the OS has time to warn you. One full discharge-to-shutoff cycle followed by a full charge resets the IC's reference curve and eliminates most of these early shutdowns.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone warm near the battery compartment on first charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell arrives with higher internal impedance than a conditioned one. The Asha 502's charge IC pushes current into that higher-impedance cell at the same rate it used with the old battery, which generates more heat during the first few charge cycles. This is expected behaviour and not a fault in the cell or the device. After two to three full charge cycles, internal impedance drops and the warmth resolves — check that the back cover seats flush so heat can dissipate normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404196642906,"sku":"BWCS-NK502SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404196675674,"sku":"BWCS-NK502SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404196708442,"sku":"BWCS-NK502SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK502SL-1.webp?v=1779369370","url":"https:\/\/batteryweb.com\/products\/nokia-asha-502-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}