{"product_id":"sunmi-p2-replacement-battery-76v-2500mah-li-polymer","title":"Sunmi P2 Replacement Battery 7.6V 2500mAh 2ICP5\/58\/84","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSunmi P2 \/ T6900 — 7.6V Li-Polymer Replacement Battery (2ICP5\/58\/84)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.6V, 2500mAh Li-Polymer battery for the Sunmi P2 and T6900 portable payment terminals. It replaces part number 2ICP5\/58\/84 and fits the original battery bay without modification. Capacity and voltage match OEM spec exactly — 19Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eP2 and T6900 compatibility:\u003c\/strong\u003e\n    Both terminals share the same 7.6V battery platform, connector pinout, and BMS handshake protocol. A single cell design covers both units because the charge IC and communication lines are electrically identical across the two models.\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 a P2 unit. The BMS accepted the handshake on first boot, charge IC entered CC\/CV mode correctly, and the protection circuit tripped as expected under a simulated overcurrent load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-deployment cycle tip:\u003c\/strong\u003e\n    After fitting this battery, run one complete transaction — card read, receipt print, and screen wake — before putting the terminal into live service. The P2 maps cell capacity during normal operation, not during idle charging, so the charge indicator will not settle until the device completes at least one active power cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the P2 reboots mid-transaction after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe P2's receipt printer draws a short, sharp current spike when the paper feed motor engages. On a new cell that hasn't completed its first full charge cycle, the BMS can read this spike as an overcurrent event and cut output to protect the cell. This trips a hard reboot rather than a graceful shutdown. To clear it, charge the battery to 100%, then run two or three test transactions so the BMS learns the printer's current signature and stops flagging it as a fault.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal stuck on boot screen and not completing PCI sequence\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Sunmi P2 runs a PCI security boot check that requires stable voltage from the battery before it releases the OS to load. If the replacement cell ships at a low state of charge, voltage at the battery terminals can sag below the threshold the boot sequence expects — typically around 7.0V under load — causing the device to stall or loop. Plug the terminal into charge before powering it on and let it reach at least 20% before attempting a boot. A full charge to 8.4V clears the condition entirely.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415927783514,"sku":"BWCS-SMP200BL-1","price":34.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415927816282,"sku":"BWCS-SMP200BL-2","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415927849050,"sku":"BWCS-SMP200BL-3","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SMP200BL-1.webp?v=1779758145","url":"https:\/\/batteryweb.com\/products\/sunmi-p2-replacement-battery-76v-2500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}