{"product_id":"franklin-wireless-r526-replacement-battery-37v-1450mah-li-ion","title":"Franklin Wireless R526 Compatible Battery 3.7V 1450mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFranklin Wireless R526 \/ R536 Series — 3.7V Li-ion Replacement Battery (YSQ2010KB001861)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V Li-ion battery at 1450mAh (5.37Wh) replaces the original pack in the Franklin Wireless R526, R526A, and R536 mobile hotspots. These are portable Wi-Fi devices that convert a cellular signal into a local wireless network. Swap in this battery when the original no longer holds charge or the device shuts down unexpectedly during a session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eR526, R526A, and R536 compatibility:\u003c\/strong\u003e\n    All three models share the same battery bay dimensions, connector pinout, and BMS communication protocol — the cellular modem and Wi-Fi radio draw from the same cell using identical voltage rails across the series.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell against the R526 BMS under simultaneous modem and Wi-Fi load. The BMS handshake completed without error, charge cycles registered correctly, and the protection circuit tripped at the expected low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eVentilation during extended hotspot sessions:\u003c\/strong\u003e\n    Keep the R526 on a hard, flat surface — not a bag or pocket. When connected devices are far from the hotspot, the cellular radio ramps to full output power. That heat builds directly against the battery. A clear surface lets the case vent it away.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the R526 drops all connected devices mid-session on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe R526 runs two high-draw systems simultaneously — the cellular modem and the Wi-Fi radio. At maximum connected devices, the combined current draw spikes sharply. If the cell's internal resistance is elevated — common in aged or counterfeit packs — voltage sags below the modem's operating floor for a fraction of a second. The BMS reads that as a fault and cuts output. A fresh cell with correct internal resistance holds voltage steady through those draw spikes and keeps the session alive.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eR526 not powering on after sitting unused for several weeks\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge at roughly 2–3% per month at room temperature. If the R526 was stored with a low charge, the cell can drop below the BMS's minimum boot voltage — typically around 3.0V — and the device will not respond to the power button. Connect to a charger for at least 20–30 minutes before attempting to power on. If the OEM battery will not recover past 3.0V after that charge window, replacement is the next step.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43377862606938,"sku":"BWCS-FWR526RC-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43377862639706,"sku":"BWCS-FWR526RC-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43377862672474,"sku":"BWCS-FWR526RC-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FWR526RC-1.webp?v=1778773918","url":"https:\/\/batteryweb.com\/products\/franklin-wireless-r526-replacement-battery-37v-1450mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}