{"product_id":"weierwei-uv3r-replacement-battery-37v-1200mah-li-ion","title":"Weierwei UV3R Compatible Battery 3.7V 1200mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWeierwei UV3R — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 1200mAh lithium-ion battery replaces the original pack in the Weierwei UV3R handheld two-way radio. The UV3R is a compact transceiver used for short-range voice communication across professional and recreational settings. Capacity and voltage match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUV3R platform fit:\u003c\/strong\u003e\n    The UV3R uses a slim slide-in pack format at 3.7V nominal. This cell matches that voltage rail and the physical footprint — 53.60 x 35.60 x 6.40mm — so the pack seats flush and the contacts align 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 full charge and simulated PTT bursts to confirm the BMS handles transmit current spikes without tripping. Voltage held stable under repeated short transmissions across the test run.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact strip check on first insertion:\u003c\/strong\u003e\n    If the charger shows a fault or refuses to begin charging on first use, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The charger needs a clean contact cycle to register the new BMS before the charge cycle starts.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the UV3R cuts out mid-transmission on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003ePressing PTT draws a sharp current spike as the RF output stage powers up. If the cell voltage is sitting at storage level — typically around 3.6V — the BMS can read that spike as an overcurrent event and trip the protection circuit. This causes the radio to cut out instantly, even though the pack is not faulty. Charge the battery fully before first transmission use; a cell at 4.1–4.2V handles the PTT surge without triggering the BMS cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after inserting new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe UV3R uses a voltage-threshold bar display — each bar corresponds to a voltage band, not a percentage. A new pack shipped at storage voltage reads lower than a fully charged cell, so the indicator shows one or two bars short of full. This is not a capacity fault. Charge the pack completely and the display will step up to the correct bar level once the cell reaches its rated 4.2V charge ceiling.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426282012762,"sku":"BWCS-BAF300TW-1","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426282045530,"sku":"BWCS-BAF300TW-2","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426282078298,"sku":"BWCS-BAF300TW-3","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BAF300TW-1.webp?v=1779930583","url":"https:\/\/batteryweb.com\/products\/weierwei-uv3r-replacement-battery-37v-1200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}