{"product_id":"mobilteil-bcl-d20-replacement-battery-36v-700mah-ni-mh","title":"Mobilteil BCL-BT10 Compatible Battery 3.6V 700mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMobilteil BCL-D20 — 3.6V Ni-MH Replacement Battery (BCL-BT10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V, 700mAh Ni-MH battery replaces the BCL-BT10 and BCL-BT20 cells in the Mobilteil BCL-D20 portable fax handset. It fits the BCL-D20 series directly and matches the original voltage and connector. Capacity is 700mAh (2.52Wh), identical to the factory specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBCL-D20 series fit:\u003c\/strong\u003e\n    The BCL-D20 handset uses a single Ni-MH cell at 3.6V. Both the BCL-BT10 and BCL-BT20 share the same voltage rail, connector pinout, and physical envelope — this replacement covers both part numbers without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the BCL-D20 platform. The BMS accepted the cell without fault codes, and voltage held stable across both idle standby and active modem-draw phases.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePre-session charging for fax transmission:\u003c\/strong\u003e\n    Charge the battery to full before starting a multi-page fax session. The BCL-D20 pulls peak current during the modem handshake and scanner phases simultaneously — a partially charged cell can drop below the minimum voltage mid-transmission and terminate the session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFax cutting out mid-transmission on the BCL-D20\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe BCL-D20 combines scanner draw, modem signalling, and thermal printer output during an active fax send. This stacked current demand can deplete a degraded or partially charged Ni-MH cell faster than the handset's low-battery indicator shows. When cell voltage drops below approximately 3.0V under load, the handset drops the modem connection and terminates the transmission. A fresh cell at full charge eliminates this voltage sag under combined load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBCL-D20 showing full charge but dying immediately on use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells that have been repeatedly shallow-cycled develop voltage depression — the cell reports a full state of charge but collapses quickly once load is applied. The BCL-D20 charger reads surface voltage, not true capacity, so the indicator is misleading on a degraded cell. This is not a charger fault. Replacing the cell and allowing one full charge cycle before use restores accurate capacity. After fitting this replacement, charge uninterrupted until the handset indicates complete — do not interrupt the first cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381523546202,"sku":"BWCS-PBT10MF-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381523578970,"sku":"BWCS-PBT10MF-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381523611738,"sku":"BWCS-PBT10MF-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PBT10MF-1.webp?v=1778901370","url":"https:\/\/batteryweb.com\/products\/mobilteil-bcl-d20-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}