{"product_id":"teleradio-tg-tx-mnl-replacement-battery-37v-1500mah-li-polymer","title":"Teleradio TG-TX-MNL Crane Remote Compatible Battery 3.7V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTeleradio TG-TX-MNL — 3.7V Li-Polymer Replacement Battery (22.381.3)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1500mAh Li-Polymer cell replaces OEM part 22.381.3 in the Teleradio TG-TX-MNL wireless crane remote transmitter. It slots into the transmitter housing at 51.60 × 34.80 × 8.10mm and matches the original connector and BMS handshake. Voltage and capacity are sourced from the OEM specification — 3.7V nominal, 5.55Wh total energy.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTG-TX-MNL transmitter fit:\u003c\/strong\u003e\n    The TG-TX-MNL uses a single-cell Li-Polymer pack at 3.7V nominal. That voltage rail drives the radio transmitter module and the solenoid-activation logic simultaneously. Any cell that drifts below the BMS cutoff threshold will drop the transmitter mid-operation, which is why cell capacity and BMS compatibility must both match the original exactly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through transmitter power-on, solenoid relay activation, and sustained radio transmission. The BMS held stable through repeated inrush events and did not trip at full charge. Voltage recovery after a solenoid pulse measured within OEM tolerance.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMonthly charge interval for idle remotes:\u003c\/strong\u003e\n    Crane remotes often sit unused for weeks between jobs. Li-Polymer cells left uncharged below 2.5V enter a deep-discharge state the BMS may not recover from. Charge this battery once a month during any idle period to keep the cell voltage above the BMS re-engagement threshold.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSolenoid activation causing power dropout on a freshly installed battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a crane remote activates a solenoid or relay, the current draw spikes sharply for a few milliseconds. If the battery cell is at storage voltage — typically around 3.6V — internal resistance is higher than at full charge. That resistance amplifies the voltage sag during the inrush event. Some BMS circuits interpret that sag as an under-voltage fault and disconnect the cell entirely, cutting the transmitter mid-command. Charge the battery fully to 4.2V before first use to minimise internal resistance and keep the BMS from tripping on relay activation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote showing low-battery indicator immediately after cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage, usually 3.6–3.7V, not at full charge. The TG-TX-MNL transmitter reads cell voltage to calculate charge state, so a cell at 3.6V will register as partially depleted even though it is brand new. This is not a faulty cell — it is a cell that has not yet been charged. Connect the transmitter to its charger and run a full charge cycle until the indicator clears before putting the remote back into service.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360052772954,"sku":"BWCS-TMX381BL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360052805722,"sku":"BWCS-TMX381BL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360052838490,"sku":"BWCS-TMX381BL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TMX381BL-1.webp?v=1778610770","url":"https:\/\/batteryweb.com\/products\/teleradio-tg-tx-mnl-replacement-battery-37v-1500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}