{"product_id":"educator-et-300tstransmitter-replacement-battery-37v-400mah-li-polymer","title":"Educator ET-300TS Transmitter Compatible Battery 3.7V 400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEducator ET-300TS Transmitter — 3.7V Li-Polymer Replacement Battery (PL-762229)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 400mAh lithium-polymer battery replaces the internal cell in the Educator ET-300TS Transmitter and related ET-300 series handheld remotes. It fits the transmitter unit — not the collar receiver. The transmitter is the handheld controller used to send signals to the dog training collar.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eET-300 transmitter series fit:\u003c\/strong\u003e\n    The ET-300TS, ET-300, ET-302, ET-300-L, and additional variants in this family share the same compact transmitter housing, connector pinout, and 3.7V power rail — which is why a single cell covers the group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the transmitter's BMS and confirmed stable charge acceptance, correct cutoff at low voltage, and no fault flags during charge or discharge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst power-on after installation:\u003c\/strong\u003e\n    After fitting this battery, hold the transmitter power button for a full 3–5 seconds — a short press may not register until the BMS completes its initialisation sequence following a full power interruption.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the ET-300TS transmitter shows a full charge but cuts out during use\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA lithium-polymer cell that has been over-discharged loses the ability to hold voltage under load even after showing a full charge on the indicator. The transmitter's voltage rail drops the moment RF transmission fires, and a degraded cell can't sustain that draw. The BMS then trips a cutoff to protect the cell, which looks like a sudden shutdown. Replacing the cell restores stable voltage delivery during active transmission.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter not pairing with the collar after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery clears the transmitter's working memory, which can drop the active pairing session with the receiver collar. This is not a fault with the new battery — it is a standard behaviour after power interruption. Power on both the transmitter and collar, then follow Educator's re-pairing sequence: hold the transmitter's Nick button while powering on the collar until the LED confirms link. The pairing signal operates at the collar's receiver end, not inside the transmitter battery circuit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360148324442,"sku":"BWCS-DET302SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360148357210,"sku":"BWCS-DET302SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360148389978,"sku":"BWCS-DET302SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-DET302SL-1.webp?v=1778610900","url":"https:\/\/batteryweb.com\/products\/educator-et-300tstransmitter-replacement-battery-37v-400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}