{"product_id":"wisycom-mpr50-iem-replacement-battery-37v-1500mah-li-ion","title":"Wisycom MPRLBP Replacement Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWisycom MPR50-IEM \/ MPR30-ENG Series — 3.7V Li-ion Replacement Battery (MPRLBP)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1500mAh Li-ion cell replaces the original MPRLBP battery in the Wisycom MPR50-IEM wireless in-ear monitor receiver and related Wisycom portable units. It fits the MPR50-IEM, MPR30-ENG, MTP60, and MPR50-IFB, among others. Capacity figures come from the product data — 5.55Wh per cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMPR50-IEM, MPR30-ENG, MTP60 and MPR50-IFB platform:\u003c\/strong\u003e\n    These units share the same MPRLBP cell format, connector pinout, and BMS handshake protocol. The receiver's power management IC authenticates the pack on insertion — same voltage rail, same communication line across all four models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Wisycom-compatible test rig, running the BMS through charge, standby, and active RF draw. The protection circuit responded correctly to over-current and end-of-discharge thresholds, and the receiver logged the pack without error on first insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle BMS logging on the MPR50-IEM:\u003c\/strong\u003e\n    Before your first use on stage, seat the receiver in its charging dock and run one complete charge cycle uninterrupted. The MPR50-IEM's power management firmware registers the new cell's internal resistance profile during that first full charge — skipping it means the battery gauge reads inaccurately until the cycle completes.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the MPR50-IEM receiver cuts out mid-transmission on a fresh pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe MPR50-IEM draws current from two loads simultaneously — the UHF receive circuit and the audio output stage feeding the IEM driver. Under peak combined draw, a new cell at storage voltage (typically 3.6–3.7V) can sag below the BMS cutoff threshold momentarily. This looks like a dropout rather than a dead battery. The fix is a full charge cycle before use, which brings the cell to 4.2V and gives the BMS enough headroom to handle the combined peak draw without tripping.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver shows charged but audio cuts after a few minutes of use\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom points to a cell sitting at storage voltage while the dock's charge indicator reads full — a mismatch between the dock's charge-complete signal and the actual cell state. The dock terminates charge based on current drop, but a cell shipped at storage voltage can trigger that threshold early. Remove the battery, reinsert it, and run a second full charge cycle from scratch. If the receiver's gauge then climbs past 4.1V and holds, the cell is correctly logged and the symptom will not return.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428117381210,"sku":"BWCS-WMR500SL-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428117413978,"sku":"BWCS-WMR500SL-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428117446746,"sku":"BWCS-WMR500SL-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WMR500SL-1.webp?v=1779934190","url":"https:\/\/batteryweb.com\/products\/wisycom-mpr50-iem-replacement-battery-37v-1500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}