{"product_id":"sportdog-sd-2525-prohunter-transmitter-replacement-battery-74v-650mah-li-ion","title":"SportDog SD-2525 ProHunter Transmitter Compatible Battery 7.4V 650mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSportDog SD-2525 ProHunter Transmitter — 7.4V Li-ion Replacement Battery (SDT00-13514)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 650mAh Li-ion battery fits the SportDog SD-2525 ProHunter handheld remote transmitter. It powers the unit that sends commands to receiver collars worn by dogs during field training and hunting. Voltage and cell count match the original — the transmitter's BMS will accept this cell without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSD-2525 transmitter family compatibility:\u003c\/strong\u003e\n    The SD-2525, ProHunter 2525, and ST101-SP share the same battery bay geometry, 7.4V two-cell configuration, and connector pinout. One SKU covers the full group because the BMS handshake protocol is identical across these transmitter revisions.\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 SD-2525 platform. The BMS accepted the cell without triggering a protection cutoff, and voltage held within the expected window under transmitter load.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eField transmitter storage tip:\u003c\/strong\u003e\n    If the transmitter sits unused between hunting seasons, discharge it to around 50% charge before storing — leaving it at full charge for months stresses Li-ion cells and accelerates capacity loss faster than regular use does.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the SD-2525 transmitter shows full charge but dies quickly in the field\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA Li-ion cell that has been deep-discharged or left depleted for an extended period loses usable capacity even after a full recharge. The BMS reports voltage-based state of charge, which can read 100% while the actual amp-hour capacity has dropped significantly. On the SD-2525, this shows up as the transmitter lasting a fraction of a normal field session before shutting down. Replacing the cell resets the usable capacity — the BMS calibration follows the new cell's actual voltage curve within a few charge cycles.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTransmitter powers on but collar stops responding mid-session\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis symptom often points to voltage sag under the RF transmission load rather than a full power failure. When the cell ages, internal resistance rises — each transmit pulse causes a momentary voltage dip that can trip the BMS undervoltage protection, resetting the transmitter's RF output. The collar then loses the command signal. Fitting a fresh cell with lower internal resistance eliminates the sag; verify the transmitter holds above 7.0V under active use to confirm the new cell is performing correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360170639450,"sku":"BWCS-SD252SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360170672218,"sku":"BWCS-SD252SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360170704986,"sku":"BWCS-SD252SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SD252SL-1.webp?v=1778610941","url":"https:\/\/batteryweb.com\/products\/sportdog-sd-2525-prohunter-transmitter-replacement-battery-74v-650mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}