{"product_id":"royaltek-hew-r02-1-replacement-battery-37v-1000mah-li-ion","title":"Royaltek HEW-R02-1 Compatible Battery 3.7V 1000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRoyaltek HEW-R02-1 Series — 3.7V Li-ion Replacement Battery (HEW-R02-1)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1000mAh lithium-ion cell replaces the internal battery in Royaltek GPS navigators including the HEW-R02-1, RBT-1000, RBT-1100, and RBT-2000. It matches the original cell's footprint at 52.96 × 33.64 × 5.15mm and uses the same connector pinout. Fit it when the original cell no longer holds a charge through a full navigation session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRBT and HEW series compatibility:\u003c\/strong\u003e\n    These models share a common 3.7V single-cell architecture with the same BMS handshake protocol and physical connector. Swapping across this family works because the charge termination voltage and protection circuit thresholds are identical across the lineup.\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 a Royaltek GPS unit. The BMS accepted charge without fault flags, hit full termination voltage at 4.2V, and the protection circuit tripped correctly at the low-voltage cutoff threshold — no manual reset required.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCold-start satellite acquisition after swap:\u003c\/strong\u003e\n    After fitting this cell, power the GPS on outdoors before driving. The unit loses its satellite almanac data on full power removal and needs a cold start — allow 5–10 minutes for first fix in open sky. Subsequent power cycles will lock on in under a minute.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eGPS accuracy dropping at low battery on Royaltek navigators\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eSome Royaltek units reduce RF receiver sensitivity when cell voltage falls below roughly 3.5V — a power-saving measure built into the GPS chipset firmware. At reduced sensitivity, the receiver drops weaker satellite signals, which widens the position error circle. This shows up as the map position lagging or jumping on narrow roads. Keeping the cell above 3.6V under load maintains full receiver gain and normal fix accuracy.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice shuts off without warning before the low-battery indicator appears\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe on-screen battery indicator on these Royaltek units is calibrated to the original cell's voltage curve. A new cell — or a degraded original — can have a slightly different discharge curve, so the indicator reads one bar remaining while the actual cell voltage is already near the BMS cutoff. The BMS cuts power at approximately 3.0V to protect the cell, which looks like a sudden shutdown. After fitting this replacement, run two or three full charge-to-discharge cycles so the device firmware recalibrates its voltage-to-percentage mapping.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377705189466,"sku":"BWCS-XEW01SL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377705222234,"sku":"BWCS-XEW01SL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377705255002,"sku":"BWCS-XEW01SL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-XEW01SL-1.webp?v=1778771896","url":"https:\/\/batteryweb.com\/products\/royaltek-hew-r02-1-replacement-battery-37v-1000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}