{"product_id":"dogtra-1900s-receiver-replacement-battery-74v-300mah-li-polymer","title":"Dogtra BP74RS Receiver Compatible Battery 7.4V 300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDogtra 1900S \/ 1902S Receiver — 7.4V Li-Polymer Replacement Battery (BP74RS)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 300mAh Li-Polymer battery for the Dogtra 1900S and 1902S Receiver units, including the 1900S-BE Black Edition and 1900S-HF Hands Free. It slots into the receiver collar — the unit worn by the dog — not the handheld transmitter. Replaces OEM part numbers BP74RS and BP74RS3P.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1900S \/ 1902S receiver compatibility:\u003c\/strong\u003e\n    These models share the same compact receiver housing, connector pinout, and BMS communication protocol. The same 7.4V Li-Polymer cell fits all variants in this receiver family without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through charge and discharge on a 1900S receiver unit. The BMS accepted the cell without fault codes, charge termination triggered correctly at full voltage, and stimulation output held consistent across the test range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use receiver pairing after battery swap:\u003c\/strong\u003e\n    After fitting this battery, power on the receiver outdoors and keep it within range of the transmitter. A freshly powered receiver re-establishes its RF link with the transmitter within a few seconds — confirm the link indicator on the transmitter shows solid before starting a session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the 1900S receiver stops responding mid-session after a battery replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 1900S receiver's BMS monitors cell voltage in real time and cuts output if voltage drops below its low-cell threshold — typically around 6.4V under load. A partially discharged or poorly seated replacement cell can trigger this cutoff during active stimulation bursts, which draw a short spike of current. If the receiver goes unresponsive mid-session, the first check is the battery seating — the contacts must be flush. Charge the new battery fully before the next session to ensure the BMS starts with accurate state-of-charge data.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReceiver charge indicator stays red and never turns green\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually means the BMS entered a protection state during a deep discharge — common when a collar sits unused for several months. The cell voltage drops below the BMS re-entry threshold, and the charger cannot initiate a normal charge cycle. Connect the receiver to its Dogtra charger for 30–60 minutes even if the LED appears stuck; some BMS chips trickle-charge at a low rate before switching to full current. If the indicator still does not transition to green after that period, check charger output — it should read approximately 8.4V DC at the connector tip.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360151634010,"sku":"BWCS-SDR190SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360151666778,"sku":"BWCS-SDR190SL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360151699546,"sku":"BWCS-SDR190SL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SDR190SL-1.webp?v=1778610919","url":"https:\/\/batteryweb.com\/products\/dogtra-1900s-receiver-replacement-battery-74v-300mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}