{"product_id":"pioneer-avic-s1-replacement-battery-37v-1250mah-li-ion","title":"Pioneer AVIC-S1 GPS Navigator Replacement Battery 3.7V 1250mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePioneer AVIC-S1 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1250mAh Li-ion cell replaces the original battery in the Pioneer AVIC-S1 portable GPS navigator. The AVIC-S1 is a dashboard-mounted vehicle navigation unit, and this battery restores power to its GPS receiver, display, and onboard routing functions. Dimensions are 50.00 × 36.60 × 6.60mm — confirm these against your existing cell before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAVIC-S1 navigator fit:\u003c\/strong\u003e\n    The AVIC-S1 runs a single-cell 3.7V Li-ion architecture. This cell matches that voltage rail and physical footprint, so the BMS in the unit communicates with it the same way it did with the factory cell.\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 bench. The AVIC-S1's protection circuit engaged at the correct cutoff voltages — no runaway charge, no premature low-battery trip.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start satellite acquisition after fitting:\u003c\/strong\u003e\n    After any full power interruption, the AVIC-S1 performs a cold start. Power the unit on outdoors with a clear view of the sky and leave it stationary. First satellite fix takes 5–10 minutes. Subsequent warm starts drop back under a minute once the almanac is cached.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS accuracy reduced at low battery on the AVIC-S1\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen cell voltage drops toward the lower end of the discharge curve, the AVIC-S1 scales back receiver sensitivity to reduce current draw. This shows up as a wider position error or sluggish map tracking — not a software fault. The fix is straightforward: keep the unit on the vehicle charger during active navigation rather than running off battery. A degraded original cell accelerates this behaviour because its usable voltage window collapses faster than a fresh cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAVIC-S1 shuts off without a low-battery warning\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a new cell, the battery indicator may not be calibrated to it. The unit's fuel gauge was tracking the old, degraded cell and its voltage curve — it no longer maps accurately to the new cell. The result is the indicator showing two or three bars right up until the cutoff voltage of approximately 3.0V is hit, then the unit drops off without warning. Run two full charge-to-discharge cycles on the new cell to let the gauge recalibrate against the actual capacity.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377718296666,"sku":"BWCS-MIOP350SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377718329434,"sku":"BWCS-MIOP350SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377718362202,"sku":"BWCS-MIOP350SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MIOP350SL_1.webp?v=1778771881","url":"https:\/\/batteryweb.com\/products\/pioneer-avic-s1-replacement-battery-37v-1250mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}