{"product_id":"metropcs-n9120-replacement-battery-37v-3600mah-li-ion","title":"Li3817T42P3h735044 Replacement Battery MetroPCS N9120 3.7V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMetroPCS N9120 \/ Avid 4G — 3.7V Li-ion Replacement Battery (Li3817T42P3h735044)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 3600mAh Li-ion replacement battery for the MetroPCS N9120, Avid 4G, and Avid smartphones. It carries OEM part number Li3817T42P3h735044 and fits the ZTE-manufactured hardware under the MetroPCS label. Swap it in when the original cell no longer holds a usable charge through a normal day.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eN9120 \/ Avid 4G platform fit:\u003c\/strong\u003e\n    These three model names share the same ZTE hardware platform, the same connector pinout, and the same BMS handshake protocol. One cell covers all three — no adapter or modification required.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge and load cycle on the N9120 board. The BMS accepted the charge profile without fault, voltage held steady at 3.7V nominal under screen-on and modem-active load, and the protection circuit triggered cleanly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and let the phone complete one full discharge-to-charge cycle at standard current. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins pushing 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 N9120 after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe N9120's fuel gauge IC retains the discharge curve from the old, degraded cell. When a new high-capacity cell is installed, the IC's stored curve no longer matches actual cell voltage under load. The modem radio draws a surge of current, cell voltage dips sharply, and the IC interprets that dip as a depleted cell — triggering a shutdown even though charge remains. One complete discharge cycle without fast charging lets the coulomb counter reset and re-anchor to the new cell's actual voltage floor, typically around 3.4V under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePhone won't power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge in storage. If this cell dropped below approximately 2.5V per cell during a long storage period, the BMS trips into lockout mode to prevent damage. The phone will show no response — no charge indicator, no boot. Connect the phone to a wall charger rated at least 5V\/1A and leave it untouched for 20–30 minutes. Once the BMS detects voltage recovering above its wake threshold, the charge IC takes over and the phone should display the charging indicator.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43404331319386,"sku":"BWCS-ZTE912HL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43404331352154,"sku":"BWCS-ZTE912HL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43404331384922,"sku":"BWCS-ZTE912HL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ZTE912HL-1.webp?v=1779369779","url":"https:\/\/batteryweb.com\/products\/metropcs-n9120-replacement-battery-37v-3600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}