{"product_id":"yamaha-rm-wgl-replacement-battery-37v-1800mah-li-polymer","title":"Yamaha RRC1120 Wireless Microphone Replacement Battery 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eYamaha RM-WGL \/ RM-WGS — 3.7V Li-Polymer Replacement Battery (RRC1120)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1800mAh (6.66Wh) lithium-polymer battery replaces the original pack in Yamaha RM-WGL and RM-WGS wireless directional tabletop microphone units. It fits the handheld transmitter used in conference rooms, presentations, and live meeting environments. Voltage and cell format match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRM-WGL and RM-WGS platform fit:\u003c\/strong\u003e\n    Both microphone models share the same 3.7V battery rail, connector pinout, and BMS handshake protocol — one replacement pack covers the full tabletop wireless range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the RM-WGL transmitter unit and confirmed the BMS accepted the cell, completed charge termination correctly, and passed the unit's internal battery authentication check without error flags.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-session calibration tip:\u003c\/strong\u003e\n    Run a complete charge cycle before the first meeting. Yamaha's wireless transmitter maps battery state against voltage thresholds during active operation — a freshly installed pack may show inaccurate level warnings until the unit completes one full charge-to-discharge cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the RM-WGL drops connection mid-meeting under combined audio and RF draw\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe RM-WGL transmitter runs audio processing and RF transmission simultaneously during active conference sessions. This combined draw creates short current spikes that a degraded or deeply discharged cell cannot sustain without voltage sag. When cell voltage dips below the BMS cutoff threshold — typically around 3.0V under load — the unit interrupts the RF link before fully powering down. A fresh 1800mAh pack with a healthy internal resistance restores the voltage headroom needed to handle those spikes cleanly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharging dock not registering the new battery after a swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eIf the dock shows no charging activity after installing a replacement pack, the most common cause is contact resistance at the dock pins rather than a fault with the cell itself. Oxidation or debris on the battery's contact pads prevents the dock from reading a valid connection. Wipe the gold contacts on both the battery and the dock cradle with a dry cloth, then reseat the unit firmly. If the dock still shows no activity, check that resting cell voltage is above 3.2V — a pack shipped in deep storage may need a low-current pre-charge before the dock circuit recognises it.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43306866638938,"sku":"BWCS-YMH112SL-1","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43306866671706,"sku":"BWCS-YMH112SL-2","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43306866704474,"sku":"BWCS-YMH112SL-3","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-YMH112SL_1.webp?v=1777768792","url":"https:\/\/batteryweb.com\/products\/yamaha-rm-wgl-replacement-battery-37v-1800mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}