{"product_id":"dopod-c720-replacement-battery-37v-2200mah-li-ion","title":"Dopod C720 EXCA160 Replacement Battery 3.7V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDopod C720 \/ C720W — 3.7V Li-ion Replacement Battery (EXCA160)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 2200mAh Li-ion cell replaces the original EXCA160 battery in the Dopod C720 and C720W Windows Mobile smartphones. It restores power for calls, messaging, and app use on these mid-2000s devices. Capacity is 2200mAh (8.14Wh) — drawn from the product specification, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eC720 and C720W compatibility:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, connector pinout, and 3.7V single-cell architecture. The EXCA160 part number covers both variants — no hardware modification needed to fit either device.\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 the C720 platform. The BMS engaged correctly at low voltage cutoff, and charge termination triggered at the expected voltage without overrun.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After installing this cell, run one complete discharge-to-charge cycle before enabling any fast-charge option. The fuel gauge IC on the C720 was calibrated to the original cell's discharge curve — one full cycle lets it recalibrate against the new cell before high-current charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the C720 reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe C720 uses a fuel gauge IC that tracks charge by modelling the original cell's discharge curve. A new cell has a different internal resistance profile, so the IC's stored model no longer maps accurately to real voltage. The phone may show 80% when the cell is nearly flat, or drop suddenly to 10% from a high reading. One full discharge-to-charge cycle forces the IC to re-anchor its calibration to the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Dopod C720\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a voltage-cliff failure — not a capacity problem. When the screen backlight, GSM modem, and CPU all draw current simultaneously, a degraded or poorly calibrated cell cannot hold voltage under that combined load. The BMS reads voltage drop as a cutoff condition and shuts the device down even though the fuel gauge still shows charge remaining. Charge the device to 100%, run one full cycle, then check whether the reported percentage at shutdown has stabilised above 10V — if the problem persists, the fuel gauge IC needs a second full cycle to finish recalibration.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43405255802970,"sku":"BWCS-DC700XL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43405255835738,"sku":"BWCS-DC700XL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43405255868506,"sku":"BWCS-DC700XL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DC700XL-1.webp?v=1779370350","url":"https:\/\/batteryweb.com\/products\/dopod-c720-replacement-battery-37v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}