{"product_id":"pax-d200-replacement-battery-37v-1800mah-li-polymer","title":"Pax D200 Payment Terminal Replacement Battery IS057 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePax D200 Series — 3.7V Li-Polymer Replacement Battery (IS057)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1800mAh Li-Polymer battery replaces the OEM IS057 cell in the Pax D200, D200T, IS275, and Mini payment terminals. It restores operational capacity to portable POS devices used for card processing in retail and service environments. Voltage and capacity match the original specification exactly — no firmware flag, no modified charge profile.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eD200 and D200T platform fit:\u003c\/strong\u003e\n    Both models share the same 3.7V battery rail, connector pinout, and BMS handshake protocol. The IS057 cell fits either variant without any adapter or wiring change.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the D200 boot sequence and monitored the BMS handshake. The protection circuit accepted the new cell correctly, the charge IC entered standard CC\/CV mode, and the terminal reported battery status without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst deployment tip for POS terminals:\u003c\/strong\u003e\n    After installation, complete one full transaction cycle — including a receipt print — before going live. 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\"\u003eWhy the D200 reboots mid-transaction after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe receipt printer motor and wireless radio can draw a combined current spike that briefly exceeds the BMS overcurrent threshold on a new, unconditioned cell. The BMS interprets this spike as a fault and trips, cutting power mid-sale. This typically resolves after two or three full charge-discharge cycles as the BMS learns the real load profile of the terminal. If reboots continue past the third cycle, check that the replacement cell is seated flat against the connector — even slight misalignment raises contact resistance and amplifies voltage sag under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal stuck at 99% charge and won't read full\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell often enters the charger's top-off phase immediately after first installation, which holds the display at 99% for an extended period — this is normal charge IC behaviour, not a faulty battery. The charge controller is applying a low-current top-up to bring the cell to exactly 4.2V before releasing the indicator to 100%. Allow the terminal to remain on charge undisturbed for a full session. Once the cell reaches 4.2V and the charge IC exits top-off mode, the display will update and hold correctly through subsequent cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415931584602,"sku":"BWCS-PAD200BL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415931617370,"sku":"BWCS-PAD200BL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415931650138,"sku":"BWCS-PAD200BL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PAD200BL-1.webp?v=1777949695","url":"https:\/\/batteryweb.com\/products\/pax-d200-replacement-battery-37v-1800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}