{"product_id":"nexgo-n3-replacement-battery-37v-6700mah-li-ion","title":"NEXGO GX02 Payment Terminal Compatible Battery 3.7V 6700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNEXGO N3 \/ N5 — 3.7V Li-ion Replacement Battery (GX02)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 6700mAh Li-ion replacement for the GX02 battery used in the NEXGO N3 and N5 mobile payment terminals. Both terminals share the same battery bay, connector pinout, and BMS communication protocol, so a single cell covers both models. Swap it when the original cell no longer holds charge through a standard merchant shift.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eN3 and N5 shared battery platform:\u003c\/strong\u003e\n    NEXGO built the N3 and N5 around the same power rail and BMS handshake spec. The GX02 cell fits both without any adapter or firmware change — the terminal reads cell state over the same communication line on either unit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on the N3 platform. The BMS accepted the handshake on first boot, charge IC entered CC\/CV mode correctly, and protection circuits responded normally to overcurrent and overvoltage conditions.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration on the N3 and N5:\u003c\/strong\u003e\n    After fitting this cell, run the terminal through at least one complete transaction cycle before deploying it in a live environment. The charge indicator on both models maps capacity during normal operation and needs one full power cycle to display an accurate reading.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal rebooting mid-transaction after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe N3 receipt printer draws a sharp current spike — sometimes over 1.5A — each time it fires. On a new cell that has not yet completed a calibration cycle, the BMS may read that spike as an overcurrent event and trip the protection circuit. This drops the terminal mid-transaction, which looks like a crash but is actually a BMS cutoff. The fix is to run several complete transaction cycles, including printed receipts, before using the terminal in a live environment. After two or three full cycles, the BMS adjusts its load profile and the trips stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal not powering on after sitting unused in a drawer\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge over time, and the N3 draws a small standby current even when switched off. After several weeks unused, the cell can drop below the BMS recovery threshold — typically around 2.5V — and the terminal will not respond to the power button. Connect the terminal to its original charger and leave it for 20–30 minutes without pressing anything. The charge IC uses a trickle pre-charge mode to bring the cell back above the recovery threshold before switching to normal CC\/CV charging. Once the charge LED activates, the cell is above 2.8V and the terminal will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415927488602,"sku":"BWCS-NEX300BX-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415927521370,"sku":"BWCS-NEX300BX-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415927554138,"sku":"BWCS-NEX300BX-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NEX300BX-1.webp?v=1779758086","url":"https:\/\/batteryweb.com\/products\/nexgo-n3-replacement-battery-37v-6700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}