{"product_id":"aisino-v71-replacement-battery-37v-2200mah-li-ion","title":"Aisino V71 POS Terminal Replacement Battery IS803 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAisino V71 — 3.7V Li-ion Replacement Battery (IS803)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 2200mAh Li-ion replacement battery for the Aisino V71 portable payment terminal. It slots into the V71's battery bay and restores power to the terminal used by merchants for card processing in retail and hospitality settings. OEM part number IS803 matches the original cell format and connector.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eV71 platform fit:\u003c\/strong\u003e\n    The V71 uses a single-cell 3.7V Li-ion pack with a BMS handshake tied to the terminal's charge IC. The IS803 part number maps to that handshake, so the terminal recognises the cell and reports state of charge correctly through the firmware.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the V71's full boot sequence, ran a card transaction, and triggered the receipt printer. The BMS held steady through the combined wireless, display, and printer current draw without tripping overcurrent protection.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst deployment after installation:\u003c\/strong\u003e\n    Complete one full transaction cycle before putting the terminal into live service. The V71 maps battery capacity during normal operation and needs at least one complete power cycle to calibrate the charge indicator accurately.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceipt printer causing battery drain on the V71\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe V71's thermal printer pulls a sharp current spike every time it fires — significantly higher than the baseline draw from the display and wireless radio combined. On a degraded original battery, this spike pushes the cell voltage below the BMS discharge threshold momentarily, which can cause a mid-transaction shutdown. A fresh 2200mAh cell handles this spike cleanly because internal resistance is low. If drain still seems excessive, check whether the terminal is set to print a receipt after every transaction, including declined ones.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTerminal not completing PCI boot sequence after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe V71 runs a PCI-mandated security check on every boot that draws a short, elevated current burst. If the new battery's BMS hasn't yet completed its first charge handshake with the terminal's charge IC, the terminal may stall partway through that sequence. This isn't a faulty battery — it's the BMS and charge IC synchronising. Connect the terminal to the charger, let it reach a full charge state, then power cycle. After that first full charge, the boot sequence completes normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415938465882,"sku":"BWCS-VFX675BL-1","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415938498650,"sku":"BWCS-VFX675BL-2","price":33.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415938531418,"sku":"BWCS-VFX675BL-3","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VFX675BL-1.webp?v=1779758145","url":"https:\/\/batteryweb.com\/products\/aisino-v71-replacement-battery-37v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}