{"product_id":"tait-tp9100-replacement-battery-72v-2500mah-ni-mh","title":"Tait TP9100 Replacement Battery 7.2V 2500mAh TPA-BA-203","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTait TP9100 Series — 7.2V Ni-MH Replacement Battery (TPA-BA-203)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.2V, 2500mAh Ni-MH battery replaces the TPA-BA-203, TPA-BA-206, and TPA-BA-201 packs used in the Tait TP9100, TP9135, TP9140, and TP9155 portable radios. These are professional land mobile radios used across public safety, utilities, and enterprise field operations. Voltage and cell count match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTP9100 series compatibility:\u003c\/strong\u003e\n    The TP9100, TP9135, TP9140, and TP9155 share the same battery bay dimensions, contact layout, and 7.2V rail. All four accept the same physical pack and BMS handshake, which is why one part number covers the range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on a TP9100 chassis, held PTT through a sustained transmit sequence, and confirmed the BMS did not trip on the transmit current spike. Voltage held within expected limits across repeated keying cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the Tait dock:\u003c\/strong\u003e\n    Ni-MH cells ship at partial storage charge. The Tait rapid charger reads the pack voltage on insertion to determine charge state. If the dock LED flashes amber on first seat, wipe the contact strip with a dry cloth, reseat firmly, and allow the charger a full 60-second handshake cycle before assuming a fault.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TP9100 cuts out mid-transmission on a freshly inserted pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe TP9100 draws a sharp current spike the moment PTT is pressed — the transmitter PA stage pulls significantly more current than standby. On a Ni-MH cell that shipped at storage voltage, that spike can push the BMS into a momentary overcurrent trip before the cell has warmed up through a charge cycle. The radio cuts audio and drops the transmission without warning. Running the pack through one full charge cycle before field use brings the cell voltage up to working range and stops the BMS from tripping on that initial PTT spike.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after a full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TP9100 uses a voltage-threshold bar indicator — each bar corresponds to a voltage band, not a fuel gauge reading. A new Ni-MH cell can take two or three full charge-discharge cycles before it reaches peak capacity and holds the voltage needed to register the top bar. If the radio shows one bar short after the first charge, run a full discharge in the radio under normal transmit use, then recharge completely. After that second cycle, the resting voltage should sit above 7.4V and the indicator will reflect the correct charge state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426307965018,"sku":"BWCS-TAP910TW-1","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426307997786,"sku":"BWCS-TAP910TW-2","price":102.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426308030554,"sku":"BWCS-TAP910TW-3","price":111.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TAP910TW-1.webp?v=1779930602","url":"https:\/\/batteryweb.com\/products\/tait-tp9100-replacement-battery-72v-2500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}