{"product_id":"nolan-b5-replacement-battery-37v-800mah-li-ion","title":"Nolan B5 Wireless Headset Replacement Battery 3.7V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNolan B5 \/ B901L \/ B901R \/ N4 Series — 3.7V Li-ion Replacement Battery (PL053448P)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V 800mAh Li-ion cell that replaces the original battery in the Nolan B5, B901L, B901R, and N4 wireless headsets. It fits the slim 50.00 × 34.20 × 5.20mm cavity directly. When the factory cell no longer holds a charge, this swap restores full headset function without replacing the unit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eB5, B901L, B901R, and N4 compatibility:\u003c\/strong\u003e\n    These models share the same cell format, connector pinout, and BMS handshake protocol. A single 3.7V cell with the correct dimensions and protection circuit covers the entire group.\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 B5 platform. The onboard BMS accepted the pack without fault codes, and the protection circuit tripped correctly at low-voltage cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBase station first-cycle logging:\u003c\/strong\u003e\n    On first use, seat the headset in the base station and let it complete a full charge cycle before making a call. DECT headsets log the new cell during that first docked cycle — skipping it causes the talk-time indicator to read inaccurately for the first several uses.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station showing a charging error after fitting the new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe base station communicates with the headset's BMS before it begins charging. If the new cell arrives at storage voltage — typically around 3.6V — the base may flag a handshake mismatch or display a charge fault. This is not a faulty battery. Dock the headset, leave it seated for at least 15 minutes without interruption, and the base station will re-initialise the charge cycle. If the error clears, the BMS has accepted the pack and charging proceeds normally.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHeadset cutting out mid-call even with a charged battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nolan B5 runs both the audio codec and the DECT radio from the same 3.7V cell simultaneously. Under that combined draw, a cell weakened by age or a shallow charge can sag below the BMS cutoff threshold mid-transmission. The headset drops the call and may restart. Check that the cell reached a full charge before the call — the base station indicator light should show solid green, not pulsing. If cut-outs continue after a verified full charge, the cell voltage at load is dropping below 3.2V; confirm with a multimeter on the contacts.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43428116562010,"sku":"BWCS-NLB100SL-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43428116594778,"sku":"BWCS-NLB100SL-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43428116627546,"sku":"BWCS-NLB100SL-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NLB100SL-1.webp?v=1779934166","url":"https:\/\/batteryweb.com\/products\/nolan-b5-replacement-battery-37v-800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}