{"product_id":"bosch-fug10a-replacement-battery-72v-1000mah-ni-mh","title":"Bosch FUG10A Replacement Battery 7.2V 1000mAh B5870","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBosch FUG10A \/ FuG13a — 7.2V Ni-MH Replacement Battery (B5870)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V, 1000mAh Ni-MH battery for the Bosch FUG10A and FuG13a portable two-way radios. It replaces OEM part numbers B5870, B5870GRX, and 8697322951. Voltage and capacity match the original pack exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFUG10A and FuG13a platform fit:\u003c\/strong\u003e\n    Both radios share the same 7.2V battery bay, connector pinout, and BMS handshake protocol — one pack covers both models without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit loads on the FUG10A bench rig. The BMS held stable under sustained PTT draw and did not trigger overcurrent cutoff during normal push-to-talk bursts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the FUG10A dock:\u003c\/strong\u003e\n    If the charger shows a fault LED on first insertion, remove the pack, wipe the contact strip with a dry cloth, and reseat firmly. The dock requires a clean contact cycle to complete the BMS handshake before charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FUG10A cuts out mid-transmission on a freshly inserted battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells ship at storage voltage — typically around 1.1–1.2V per cell, which puts a six-cell 7.2V pack near 6.6–7.2V before any charge cycle. Under transmit load, that lower starting voltage can dip enough to trip the radio's low-voltage cutoff momentarily. This is not a faulty pack. Run the battery through one full charge cycle before first use and the cutoff threshold clears on subsequent transmissions.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting the B5870\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FUG10A reads battery level using fixed voltage thresholds, not a fuel-gauge chip. A new Ni-MH pack at storage voltage sits below the top threshold, so the radio displays one bar short of full even though the cell capacity is intact. Charge the pack fully — the dock green LED confirms completion — and the bar indicator will read correctly at the next power-on. If it still reads low after a full charge, check dock contact continuity first; a dirty contact strip causes incomplete charge termination and leaves the pack at roughly 7.0V instead of the expected 7.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426292170842,"sku":"BWCS-BFU130TW-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426292203610,"sku":"BWCS-BFU130TW-2","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426292236378,"sku":"BWCS-BFU130TW-3","price":48.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BFU130TW-1.webp?v=1779930583","url":"https:\/\/batteryweb.com\/products\/bosch-fug10a-replacement-battery-72v-1000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}