{"product_id":"fey-elektronik-pa-ln2-replacement-battery-37v-2200mah-li-ion","title":"Fey Elektronik PA-LN2 Replacement Battery 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFey Elektronik PA-LN2 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2200mAh (8.14Wh) Li-ion battery pack built to fit the Fey Elektronik PA-LN2. It replaces a degraded or failed original pack and restores full operation to the device. Dimensions are 52.60 × 34.20 × 11.00mm — verify these against your existing pack before ordering.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePA-LN2 fit:\u003c\/strong\u003e\n    This pack matches the PA-LN2's voltage rail and physical envelope. The connector orientation and cell configuration align with the original spec, so the device's charge circuit sees the pack as expected.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on the bench. The BMS held cutoff at the correct thresholds and the pack reached rated capacity after the first full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration:\u003c\/strong\u003e\n    If your PA-LN2 uses an integrated fuel gauge, run one complete charge-discharge cycle immediately after installation. New cells arrive at storage voltage, and the gauge needs a full cycle to map capacity accurately against the fresh cells.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack running below 3.7V on first use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacement packs ship at storage voltage — typically around 3.6V or lower — to reduce cell stress during transit. This is normal and not a fault. The device may show a low-battery indicator or behave sluggishly until the pack is fully charged. Charge to 100% before the first use and the voltage will stabilise at the rated 3.7V nominal.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack not reaching full charge on the first cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn the first charge cycle, the PA-LN2's charge IC may apply a reduced current to new cells as a conditioning step — this can cause the charge cycle to terminate earlier than expected. The pack is not defective. Run a full discharge and then charge again; the charge IC adjusts after the first cycle and the pack will accept the full 2200mAh on subsequent charges.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333480317018,"sku":"BWCS-FEK200SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333480349786,"sku":"BWCS-FEK200SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333480382554,"sku":"BWCS-FEK200SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FEK200SL-1.webp?v=1778212820","url":"https:\/\/batteryweb.com\/products\/fey-elektronik-pa-ln2-replacement-battery-37v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}