{"product_id":"sunmi-v1s-replacement-battery-37v-6700mah-li-ion","title":"Sunmi V1S POS Terminal Compatible Battery 3.7V 6700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSunmi V1S \/ V2 \/ P1 \/ W6900 — 3.7V Li-ion Replacement Battery (SMBP001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 6700mAh Li-ion replacement battery for the Sunmi V1S, V2, P1, and W6900 mobile payment terminals. It matches OEM part numbers SMBP001 and SM-INR18650M26-1S2P. If your terminal dies mid-shift or can no longer hold charge through a full trading day, this is the direct replacement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV1S, V2, P1, and W6900 compatibility:\u003c\/strong\u003e\n    These four terminals share the same single-cell 3.7V rail, the same physical cavity dimensions, and the same BMS handshake protocol. One battery fits all four without any firmware or connector workaround.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through full charge-discharge runs and simulated combined printer, display, and wireless draw. The BMS held cutoff thresholds correctly and passed charge-state reporting back to the terminal OS without errors.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap calibration for payment terminals:\u003c\/strong\u003e\n    After installation, complete one full transaction cycle before deploying in a live environment. The terminal maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator correctly.\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 battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe V1S receipt printer draws a short, sharp current spike every time it fires. On a new battery that hasn't completed a calibration cycle, the BMS can read this spike as an overcurrent event and trip the protection circuit, killing power instantly. This looks like a random reboot but it's a BMS overcurrent response, not a software crash. Run the terminal through several complete transaction cycles — including receipts — before live deployment. Once the BMS has logged normal operating current draws, 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  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge at roughly 2–3% per month. A terminal left unused for several months can drop the cell voltage below the BMS recovery threshold — typically around 2.5V — and the BMS locks out to prevent damage. The terminal won't respond to the power button. Connect the original Sunmi charger and leave it for 30–45 minutes without pressing anything; the charge IC will trickle-charge the cell back above the recovery threshold before switching to normal charge mode. Once the charge indicator appears on screen, the BMS has re-initialised.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415927259226,"sku":"BWCS-SMP100BX-1","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415927291994,"sku":"BWCS-SMP100BX-2","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415927324762,"sku":"BWCS-SMP100BX-3","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMP100BX-1.webp?v=1779758145","url":"https:\/\/batteryweb.com\/products\/sunmi-v1s-replacement-battery-37v-6700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}