{"product_id":"relm-rpu7500-replacement-battery-72v-2000mah-ni-mh","title":"Relm RPU7500 Compatible Battery BL1703 7.2V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRelm RPU7500 \/ RPV7500 — 7.2V Ni-MH Replacement Battery (BL1703)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BL1703 is a 7.2V, 2000mAh Ni-MH pack that powers the Relm RPU7500 and RPV7500 portable two-way radios. It slots into the same bay as the original and uses the same contact configuration. Replace this when your current pack no longer holds a charge between shifts.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRPU7500 and RPV7500 platform fit:\u003c\/strong\u003e\n    Both models share the same battery bay geometry, contact spacing, and 7.2V supply rail. One pack covers both variants — no adapter or wiring change needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit-load draws typical of land mobile radio use. The BMS handled the current spike at PTT press without tripping into protection mode across all test cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge sequence on Ni-MH:\u003c\/strong\u003e\n    Ni-MH cells ship at partial charge. Run the pack to low charge indicator before the first full charge — this lets the charger run a proper trickle-to-full cycle and conditions the cells correctly from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the RPU7500 cuts out mid-transmission on a new BL1703\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Ni-MH pack ships at storage voltage — typically around 6.0–6.5V across the six cells. When PTT is pressed, the transmitter draws a sharp current spike. If the cells haven't been through at least one full charge cycle, that spike can pull the pack voltage below the radio's transmit threshold, causing the audio to drop or the unit to reset briefly. Charge the BL1703 fully before first field use. After one complete charge-discharge cycle, the cells stabilise and the voltage holds steady under transmit load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after inserting a new BL1703\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe RPU7500 reads battery level using a simple voltage-threshold bar indicator — it maps resting voltage to a bar count. A new Ni-MH pack at storage voltage sits below the threshold for a full display, so the radio shows one or two bars even though the pack is not depleted. This is not a fault. Seat the pack, charge fully until the charger shows complete, then power on the radio — the bar indicator will read correctly at full charge voltage, around 8.4–8.6V open circuit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426324152410,"sku":"BWCS-HTC710TW-1","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426324185178,"sku":"BWCS-HTC710TW-2","price":56.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426324217946,"sku":"BWCS-HTC710TW-3","price":62.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTC710TW-1.webp?v=1779930634","url":"https:\/\/batteryweb.com\/products\/relm-rpu7500-replacement-battery-72v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}