{"product_id":"sportdog-sr-225-receiver-replacement-battery-37v-160mah-li-polymer","title":"SportDog SR-225 Receiver Compatible Battery 3.7V 160mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSportDog SR-225 \/ SR-225S \/ SR-225W Receiver — 3.7V Li-Polymer Replacement Battery (SAC54-13735)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 160mAh lithium-polymer battery for the SportDog SR-225, SR-225S, and SR-225W receiver collars, plus the SportHunter 825 and compatible models. It replaces OEM part SAC54-13735. The SR-225 is a wireless dog training collar receiver — this battery powers the stimulation and tone circuits that respond to the handheld transmitter.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSR-225 series and SportHunter 825 compatibility:\u003c\/strong\u003e\n    These models share the same 3.7V cell footprint, connector pinout, and BMS handshake protocol. A single cell at this voltage and physical size — 34.00 × 19.80 × 3.20mm — covers the full receiver lineup without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge and discharge on the SR-225 receiver board. The BMS accepted the cell without error flags, charge termination triggered correctly at full voltage, and stimulation output held consistent across test cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCollar reactivation after cell swap:\u003c\/strong\u003e\n    After fitting the new battery, pair the receiver to the transmitter again before field use — the SR-225 loses its link state when power is fully interrupted, and the transmitter will not send stimulus to an unpaired collar.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SR-225 receiver stops responding mid-session after a battery swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe SR-225 receiver draws a brief current spike each time it executes a stimulation command. A degraded or deeply discharged cell sags below the BMS cutoff threshold during that spike, causing the receiver to shut off even if the resting voltage looks acceptable. A fresh 160mAh cell at full charge maintains voltage above the cutoff during these transient draws. If the collar shuts off during a command after fitting this battery, confirm the cell was charged fully before use — resting voltage should read at or above 4.1V on a multimeter before installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter showing \"out of range\" when collar is nearby\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom appears when the receiver collar has lost its paired state with the transmitter after a power interruption — it is not a range problem. When the SR-225 receiver loses battery power completely, the link registration clears from memory. The transmitter interprets an unpaired collar as out of range rather than unpaired. Re-run the pairing sequence from the transmitter according to the SR-225 manual, with collar and transmitter within one metre of each other, to restore the link.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360173523034,"sku":"BWCS-SD225SL-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360173555802,"sku":"BWCS-SD225SL-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360173588570,"sku":"BWCS-SD225SL-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SD225SL-1.webp?v=1778610941","url":"https:\/\/batteryweb.com\/products\/sportdog-sr-225-receiver-replacement-battery-37v-160mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}