{"product_id":"tidradio-td-m8-replacement-battery-37v-1100mah-li-ion","title":"Tidradio TD-M8 Replacement Battery 3.7V 1100mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTidradio TD-M8 — 3.7V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 1100mAh Li-ion battery replaces the original pack in the Tidradio TD-M8 portable two-way radio. It fits the TD-M8 transceiver directly, restoring transmit and standby power when the original cell has degraded. Capacity is 1100mAh (4.07Wh) as supplied.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTD-M8 fit:\u003c\/strong\u003e\n    The TD-M8 runs a single-cell 3.7V Li-ion architecture. This pack matches that voltage rail and the physical form factor — 53.00 × 33.90 × 5.70mm — so the battery seats flush and the BMS communicates correctly with the radio's charge circuit.\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, held-PTT transmit loads, and idle standby draws. The BMS held cutoff thresholds at both ends of the discharge curve without tripping prematurely under the transmit current spike.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the TD-M8 charger:\u003c\/strong\u003e\n    If the charger shows a fault LED on first dock, remove the battery, wipe the contact pads with a dry cloth, and reseat firmly. The TD-M8 charger requires a clean contact cycle to complete the initial BMS handshake before it begins charging.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TD-M8 cuts out mid-transmission on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell ships at storage voltage — typically around 3.6–3.7V, not a full 4.2V charge. When you key PTT, transmit current spikes sharply and the BMS sees the cell voltage dip below its overcurrent threshold. The radio cuts the transmit circuit to protect the cell. Fully charge the pack before your first transmission session and the BMS will no longer trip on that initial spike.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTD-M8 bar indicator showing one fewer bar than expected on a fresh pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TD-M8 reads cell voltage directly and maps it to a bar indicator — it has no fuel gauge chip. A pack at storage voltage (around 3.65V) will show one bar short of full, even though the cell is healthy. This is not a fault with the battery. Charge the pack fully to 4.2V and the indicator will step up to the correct level.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426292891738,"sku":"BWCS-TMR446TW-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426292924506,"sku":"BWCS-TMR446TW-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426292957274,"sku":"BWCS-TMR446TW-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TMR446TW-1.webp?v=1779930602","url":"https:\/\/batteryweb.com\/products\/tidradio-td-m8-replacement-battery-37v-1100mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}