{"product_id":"astrostart-rss-5225-replacement-battery-37v-120mah-li-polymer","title":"Astrostart RSS 5225 Remote Start Battery 3.7V 120mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAstrostart RSS 5225 — 3.7V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 120mAh lithium-polymer battery replaces the internal cell in the Astrostart RSS 5225 remote start and keyless entry transmitter. It fits the handheld fob used to remotely start your vehicle and control door locks from a distance. Swap it in when the original cell can no longer hold a charge.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRSS 5225 transmitter fit:\u003c\/strong\u003e\n    The RSS 5225 fob runs a 3.7V Li-Polymer cell at this exact footprint — 24.70 x 20.30 x 3.70mm. The connector orientation and cell dimensions match the OEM slot directly, so no adapter or modification is needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge cycles and confirmed the BMS accepts a full charge without triggering over-voltage cutoff. Discharge behaviour across the transmitter's RF transmission bursts stayed consistent throughout testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eRe-sync after power interruption:\u003c\/strong\u003e\n    After replacing this battery, the RSS 5225 remote will need to be re-paired to the control module. Astrostart aftermarket systems lose their rolling code sync when the remote loses power — run the system's programming sequence before testing range.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRemote start not activating after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eReplacing the battery interrupts power to the transmitter's memory, which clears the rolling code sync between the fob and the control module. The module will not respond to commands it cannot validate. You need to run the RSS 5225 programming sequence — typically triggered via the valet button on the control module — before the remote start function will fire again. Check the system manual for the exact button press count and timing for your installation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eReduced range immediately after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-Polymer cell ships at storage voltage — typically around 3.6V, not the 3.7V operating peak. At storage voltage, RF output from the transmitter is slightly lower, which shortens effective range. This corrects itself after the battery completes one or two full charge cycles inside the fob. Charge the remote fully before testing maximum range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416113807450,"sku":"BWCS-VPR752SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416113840218,"sku":"BWCS-VPR752SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416113872986,"sku":"BWCS-VPR752SL-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VPR752SL-1.webp?v=1779760331","url":"https:\/\/batteryweb.com\/products\/astrostart-rss-5225-replacement-battery-37v-120mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}