{"product_id":"diesel-dzt2002-replacement-battery-38v-370mah-li-polymer","title":"Diesel DZT2002 Smartwatch Compatible Battery 3.8V 370mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDiesel DZT2002 — 3.8V Li-Polymer Replacement Battery (APP00222)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.8V, 370mAh lithium-polymer cell for the Diesel DZT2002 smartwatch. It replaces OEM part APP00222 and restores power to timekeeping, notifications, heart rate monitoring, and Bluetooth connectivity. Dimensions are 31.00 × 26.00 × 4.00mm — measure your existing cell before fitting if the watch has been previously repaired.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDZT2002 platform fit:\u003c\/strong\u003e\n    The DZT2002 uses a flat Li-Polymer pouch cell with a specific connector orientation tied to the watch's power management IC. This cell matches that connector and the BMS voltage thresholds the board expects at startup.\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 a DZT2002-class board. The BMS accepted the cell without fault flags, and the fuel gauge IC initialised correctly after a full charge from near-zero.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge calibration after swap:\u003c\/strong\u003e\n    Place the watch on its charger immediately after fitting this cell and charge to 100% before first use. The fuel gauge IC on the DZT2002 loses its reference point when the original cell is removed and cannot calibrate accurately without a complete charge cycle starting from near-zero.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the DZT2002 shows 0% immediately after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DZT2002 uses a coulomb-counting fuel gauge IC that tracks charge state relative to a stored reference. Removing the old cell wipes that reference from volatile memory. When the new cell is fitted, the IC has no baseline and defaults to 0% or shuts down the display to protect the cell. This is not a fault with the replacement cell. Charge the watch fully from near-zero and the IC will re-establish its reference — the percentage reading will then track correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge contacts not engaging on the magnetic charger after reassembly\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the watch does not respond when placed on its magnetic charger after a cell swap, the charge contacts on the case back have likely shifted slightly during reassembly. Even a 0.5mm misalignment is enough to break contact with the charger's magnetic pins. Re-seat the back cover and press firmly at each corner until it clicks flush. Confirm alignment by checking that the charger indicator lights within 10 seconds of placement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416149753946,"sku":"BWCS-DZT200SH-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416149786714,"sku":"BWCS-DZT200SH-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416149819482,"sku":"BWCS-DZT200SH-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DZT200SH-1.webp?v=1779760467","url":"https:\/\/batteryweb.com\/products\/diesel-dzt2002-replacement-battery-38v-370mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}