{"product_id":"dji-mic-2-charging-case-replacement-battery-385v-450mah-li-polymer","title":"DJI MIC 2 Charging Case Replacement Battery 3.85V 450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDJI MIC 2 Charging Case — 3.85V Li-Polymer Replacement Battery (W731834)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 450mAh Li-Polymer battery for the DJI MIC 2 charging case. It replaces part number W731834 — the internal cell that keeps the case topped up and ready to recharge your MIC 2 transmitters and receiver on location. When this cell degrades, the case stops holding charge and your transmitters go into a shoot without a full top-up.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMIC 2 Charging Case fit:\u003c\/strong\u003e\n    The case uses a compact Li-Polymer cell running a 3.85V nominal rail to match the internal charge management circuit. W731834 is the only listed OEM part number for this unit — there is no cross-compatible variant from another DJI case that shares this footprint and BMS handshake.\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 a case unit. The BMS accepted the cell without fault codes, charge pass-through to the transmitter bays functioned normally, and the LED indicator sequence behaved as expected across the full state-of-charge range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCase storage between shoots:\u003c\/strong\u003e\n    Do not leave the case fully depleted in a bag for weeks. Li-Polymer cells at near-zero charge self-discharge below the BMS recovery threshold faster than larger cells — a brief top-up charge before storage keeps the cell above 3.6V and prevents a locked-out BMS on your next job.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MIC 2 case LED flashes but transmitters never reach full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA degraded case battery can hold enough charge to light the LEDs but not enough to push a full charge cycle into both transmitter bays simultaneously. The case BMS throttles output current when the cell voltage sags mid-cycle. You will see the transmitter indicator stall at two bars and stop climbing. Replacing the W731834 cell restores the full capacity needed to complete both charge cycles back-to-back.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharging case showing full on the indicator but transmitters die early in a session\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a cell-age problem, not a transmitter problem. A worn Li-Polymer cell reads near-full voltage under no load, so the LED indicator shows full — but voltage collapses as soon as current flows into the transmitter bays. The transmitters receive a partial charge and run out faster than expected in the field. Swap the case battery and confirm it holds above 3.85V under charge load before your next shoot.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381522661466,"sku":"BWCS-DJX200SL-1","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381522694234,"sku":"BWCS-DJX200SL-2","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381522727002,"sku":"BWCS-DJX200SL-3","price":47.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DJX200SL-1.webp?v=1778901369","url":"https:\/\/batteryweb.com\/products\/dji-mic-2-charging-case-replacement-battery-385v-450mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}