{"product_id":"netgear-nighthawk-ac1900-replacement-battery-108v-3400mah-li-ion","title":"Netgear PB022-100NAS Nighthawk AC1900 10.8V Compatible Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNetgear Nighthawk AC1900 — 10.8V Li-ion Replacement Battery (PB022-100NAS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is the Li-ion backup battery for the Netgear Nighthawk AC1900 cable modem. It replaces part number PB022-100NAS and restores the modem's ability to maintain network connectivity during mains power outages. Rated at 10.8V and 3400mAh (36.72Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNighthawk AC1900 modem compatibility:\u003c\/strong\u003e\n    The AC1900 backup battery bay uses a specific three-cell 10.8V Li-ion pack with a dedicated connector and BMS handshake that the modem firmware polls before enabling backup mode. A voltage or connector mismatch causes the modem to reject the battery entirely and log a fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through the AC1900's battery acceptance sequence. The BMS handshake completed correctly, the modem registered a valid pack, and the charge circuit activated as expected. No faults were logged during the test cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for cable modem backup batteries:\u003c\/strong\u003e\n    After installing this battery, leave the modem plugged into mains power for at least four hours before testing backup mode. The AC1900 firmware requires a full charge cycle to register the new pack as ready — attempting a failover test before this window completes will result in a false failure or battery error on the status LED.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nighthawk AC1900 shows a battery error after a fresh installation\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe AC1900 runs a firmware-level battery validation check each time a new pack is installed. Until the modem has pushed enough charge through the new cells to confirm capacity, it flags the battery state as unknown or faulty — this is normal behaviour, not a sign of a bad battery. The error typically clears within 24 hours of continuous mains connection as the firmware completes its acceptance cycle. Do not power-cycle the modem during this window, as that resets the charge counter and extends the validation period.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVoIP calls drop during a power outage even though internet stays up\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eData traffic and VoIP traffic draw different sustained power levels from the backup battery. The AC1900 firmware prioritises the DOCSIS data connection first, and VoIP requires a higher, sustained current draw that the battery must be at full capacity to support. If the battery is only partially charged when the outage hits, the modem will maintain the data link but cannot sustain the power needed to keep the phone line active. Charge the battery to 100% — confirmed by a solid battery LED with no error — before relying on it for voice calls.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333522980954,"sku":"BWCS-CPB013RX-1","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333523013722,"sku":"BWCS-CPB013RX-2","price":70.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333523046490,"sku":"BWCS-CPB013RX-3","price":77.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPB013RX-1.webp?v=1778212933","url":"https:\/\/batteryweb.com\/products\/netgear-nighthawk-ac1900-replacement-battery-108v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}