{"product_id":"nokia-icom-replacement-battery-38v-2200mah-li-ion","title":"Nokia BV-5QW iCOM Replacement Battery 3.8V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia iCOM \/ Lumia 929 Series — 3.8V Li-ion Replacement Battery (BV-5QW)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BV-5QW is a 3.8V, 2200mAh (8.36Wh) Li-ion cell that fits the Nokia iCOM, Lumia 929, Lumia 929+, and RM927. This battery powers the device's internal components, including the modem, display, and SoC. It is a direct OEM part number match to the original BV-5QW specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLumia 929 platform fit:\u003c\/strong\u003e\n    The iCOM, Lumia 929, Lumia 929+, and RM927 all share the same battery bay dimensions, connector pinout, and BMS handshake protocol. Swapping between these models does not require an adapter or firmware change — the cell communicates directly with the device's charge IC.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell on a Lumia 929 and monitored the BMS through a full charge cycle. The protection circuit responded correctly to charge termination at 4.2V and did not trip during modem-load draw spikes. Charge IC handshake completed on the first cycle without fault flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-charge cycle to standard rate. This allows the fuel gauge IC to map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.\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 Lumia 929 after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage cliff issue, not a capacity defect. When the fuel gauge IC is still calibrated to the old cell's discharge curve, it misreads state-of-charge on the new cell. Under modem or display load, the new cell's voltage drops faster than the IC expects at that percentage point. The device interprets this as a critically low voltage event and shuts down even though nominal capacity remains. One full discharge-charge cycle at standard rate forces the coulomb counter to reset against the new cell's actual curve — after that, the percentage readout tracks correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not triggering on the first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, some Nokia charge ICs require the battery BMS to complete one standard-rate handshake before accepting a fast-charge protocol request. If you plug into a fast charger immediately after install, the charge IC may fall back to 5V\/0.5A trickle rate and stay there for the session. Unplug, wait 10 seconds, and reconnect — or use a standard 5V charger for the first full cycle. Fast charging typically activates normally from the second cycle onward once the BMS has logged a completed charge event.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404272205914,"sku":"BWCS-NK929XL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404272238682,"sku":"BWCS-NK929XL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404272271450,"sku":"BWCS-NK929XL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NK929XL-1.webp?v=1779369616","url":"https:\/\/batteryweb.com\/products\/nokia-icom-replacement-battery-38v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}