{"product_id":"garmin-varia-tl-replacement-battery-37v-950mah-li-polymer","title":"Garmin Varia TL 361-00082-00 Replacement Battery 3.7V 950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGarmin Varia RTL510 \/ TL Series — 3.7V Li-Polymer Replacement Battery (361-00082-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 950mAh lithium-polymer cell replacing OEM part 361-00082-00. It fits the Garmin Varia TL, RTL510, and Varia RTL501 rear radar light units. These are cycling safety devices — the battery drives both the LED array and the radar transmitter simultaneously.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVaria TL \/ RTL510 \/ RTL501 fitment:\u003c\/strong\u003e\n    All three models share the same battery bay dimensions and BMS handshake protocol. The cell footprint is 61.40 × 27.10 × 6.00mm — even a fractional variance causes connector misalignment and intermittent power drops mid-ride.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on RTL510 hardware. The BMS accepted full charge without fault codes and managed the dual radar-plus-LED load without triggering an early protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eNight-ride charge protocol:\u003c\/strong\u003e\n    Charge the unit fully before a night ride. The LED driver steps down output power as cell voltage decreases — a partially charged cell will drop brightness well before the low-battery indicator appears on your head unit.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Varia RTL510 dims before the battery indicator triggers\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LED driver in these units regulates output by stepping down current as cell voltage sags under load. At roughly 3.5V the driver reduces brightness to stay within its input range. The battery gauge on your Garmin head unit lags behind actual cell voltage, so the light visibly dims before the indicator catches up. This is not a fault — it is the driver protecting itself from an undervoltage condition.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB charging not accepted after a wet ride\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Varia TL series charges via a magnetic or micro-USB port that sits exposed at the rear of the unit. Water ingress after rain leaves a conductive film across the port contacts, and the charger handshake fails. The unit will not accept charge — and may show no charging indicator at all. Allow the port to dry completely for several hours before connecting, then confirm the charge LED activates within 30 seconds of plugging in.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43333504270426,"sku":"BWCS-GRV510LS-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43333504303194,"sku":"BWCS-GRV510LS-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43333504335962,"sku":"BWCS-GRV510LS-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GRV510LS-1.webp?v=1778212934","url":"https:\/\/batteryweb.com\/products\/garmin-varia-tl-replacement-battery-37v-950mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}