{"product_id":"epson-tmp20-replacement-battery-74v-1150mah-li-ion","title":"Epson TMP20 Replacement Battery 7.4V 1150mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEpson TM-P20 Series — 7.4V Li-ion Replacement Battery (P-C32C831093)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 1150mAh Li-ion battery replaces the original cell in the Epson TM-P20, TM-P20II, TM-P20II (101), and Mobilink TM-P20II portable receipt printers. It matches the OEM part numbers P-C32C831093, OT-BY20, 2165069, and D171A. The TM-P20 series is a mobile thermal receipt printer used in point-of-sale, delivery, and field service environments where wired power is not available.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTM-P20 series compatibility:\u003c\/strong\u003e\n    All listed models run the same 7.4V battery rail, share the same physical connector, and use the same BMS handshake protocol. A cell swap on any variant in this family does not require firmware or configuration changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this battery through the TM-P20's BMS and confirmed correct charge acceptance, thermal head voltage delivery under continuous print load, and paper feed motor current draw without BMS cutoff or undervoltage fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst deployment after install:\u003c\/strong\u003e\n    Charge to full, then print five consecutive test receipts before taking the unit into the field. The TM-P20's BMS sets its current profile against the paper feed motor draw during initial cycles — skipping this step can leave the BMS calibration incomplete on a fresh cell.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TM-P20 drops Bluetooth mid-job at low battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe TM-P20 powers its Bluetooth radio and thermal print head from the same cell. When battery voltage sags below roughly 6.8V under combined load, the radio module loses stable power first — the printer drops the Bluetooth connection before it triggers a low-battery warning on screen. This is not a pairing fault or an app issue. Recharging the battery to full restores the radio's voltage margin and the connection drops stop. If the issue returns quickly after a full charge, the cell has likely degraded past its usable capacity threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePrint output fading or streaking on a charged battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eFaded or uneven print on a battery that shows a charge indicator is usually a thermal head voltage issue, not a paper or head-cleaning problem. The TM-P20's thermal head requires a steady voltage to hold print temperature across the full receipt width — voltage sag mid-print drops head temperature unevenly, producing light bands or streaking. A degraded cell can read as charged but collapse under the current spike the thermal head demands. Swap to a fresh cell and check that print output is solid black at rated contrast before ruling out the battery.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43415991058522,"sku":"BWCS-ESP200SL-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43415991091290,"sku":"BWCS-ESP200SL-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43415991124058,"sku":"BWCS-ESP200SL-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ESP200SL-1.webp?v=1779758841","url":"https:\/\/batteryweb.com\/products\/epson-tmp20-replacement-battery-74v-1150mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}