{"product_id":"tait-tp8100-replacement-battery-74v-2600mah-li-ion","title":"Tait TP8100 Replacement Battery 7.4V 2600mAh TT35L1-D","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTait TP8100 Series — 7.4V Li-ion Replacement Battery (TT35L1-D)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 2600mAh (19.24Wh) lithium-ion battery replaces the Tait TT35L1-D and fits the TP8100, TP8110, TP8115, and TP8120 portable two-way radios. It also covers additional TP8100-series variants sharing the same connector and BMS handshake. Compatible OEM references include TPA-BA-100, TPK-BA-101, TPK-BA-100, and T03-00011-CAAA.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTP8100 series compatibility:\u003c\/strong\u003e\n    The TP8110, TP8115, and TP8120 share the same 7.4V power rail, physical connector, and BMS communication protocol as the TP8100. One battery format covers the full platform — no variant-specific firmware or lock-out applies.\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 load discharge on TP8100-series hardware. The BMS accepted the charge cycle cleanly and held the voltage threshold required to sustain transmit current without triggering overcurrent cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-insertion contact check:\u003c\/strong\u003e\n    If the charger dock shows a fault LED on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The TP8100 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 TP8100 cuts out mid-transmission on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew lithium-ion cells ship at storage voltage — typically around 3.6–3.7V per cell, not full charge. When you key the PTT on a freshly inserted battery, the transmit current spike can pull the pack voltage below the BMS overcurrent threshold before the cells have been fully conditioned. The radio interprets this as a fault and interrupts transmission. Run one full charge cycle before field use — this brings both cells to 4.2V and sets the BMS baseline for accurate voltage-threshold monitoring under TX load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting this pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TP8100 uses a voltage-threshold bar indicator, not a capacity-counting chip. At storage voltage, the resting cell voltage maps to a lower bar tier than a fully charged pack. This is not a fault with the battery. Charge the pack fully — target 8.4V across the pack at charger termination — and the indicator will read the correct level on the next power cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426311831642,"sku":"BWCS-TAP815TW-1","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426311864410,"sku":"BWCS-TAP815TW-2","price":64.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426311897178,"sku":"BWCS-TAP815TW-3","price":71.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TAP815TW-1.webp?v=1779930681","url":"https:\/\/batteryweb.com\/products\/tait-tp8100-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}