{"product_id":"trimble-juno-sa-replacement-battery-37v-2400mah-li-polymer","title":"Trimble Juno SA GPS Replacement Battery 3.7V 2400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTrimble Juno SA\/SB\/SC\/SD Series — 3.7V Li-Polymer Replacement Battery (66450-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 2400mAh Li-Polymer battery replaces the OEM pack in the Trimble Juno SA, SB, SC, and SD handheld GPS receivers. These are rugged field data collectors used in surveying, mapping, and GIS work. Voltage and cell format match the original spec exactly — no adapter or modification needed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eJuno SA\/SB\/SC\/SD platform fit:\u003c\/strong\u003e\n    All four Juno variants share the same battery bay dimensions, connector pinout, and BMS communication protocol. One pack covers the full series because Trimble kept the power architecture consistent across these models.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and discharge cycles on a Juno SD unit. The BMS handshake completed on first install, state-of-charge reporting was stable, and the protection circuit tripped correctly at the low-voltage cutoff threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eField deployment prep:\u003c\/strong\u003e\n    After swapping the pack, run a full GPS acquisition and data-sync cycle before heading into the field. The Juno recalibrates its battery state indicator during active use — skipping this step often causes the low-battery warning to trigger early on the first full session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS lockout after the Juno sat unused in a carry case for months\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-Polymer cells that sit discharged long enough drop below the BMS recovery threshold — typically around 2.5V per cell. When this happens, the protection circuit locks out charging and the device shows nothing when plugged in. A standard charger won't break through because the BMS blocks current below that floor. Connect the Juno to its OEM cradle charger and hold it on charge for 20–30 minutes before attempting to power on — the charger's trickle stage can recover packs sitting just above the hard cutoff floor.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS receiver powers on but shuts off during USB data transfer to PC\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eUSB data transfer pulls current from both the CPU and the USB controller simultaneously — on a degraded or partially charged pack, this combined load causes a voltage dropout that the BMS reads as an unsafe condition and cuts power. This isn't a firmware fault; it's the protection circuit doing exactly what it should when cell voltage sags under load. Charge the pack to at least 3.9V before starting any transfer session. If the shutdown repeats on a fully charged new pack, check the USB cable — a resistive cable increases draw and can tip the same threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360630538330,"sku":"BWCS-TRS100SL-1","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360630571098,"sku":"BWCS-TRS100SL-2","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360630603866,"sku":"BWCS-TRS100SL-3","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TRS100SL-1.webp?v=1778616135","url":"https:\/\/batteryweb.com\/products\/trimble-juno-sa-replacement-battery-37v-2400mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}