{"product_id":"zodiac-pa2099-replacement-battery-12v-1100mah-ni-mh","title":"Zodiac PA2099 12V Ni-MH Compatible Battery 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eZodiac PA2099 \/ PA4099 \/ PA5099 \/ PA5499 Series — 12V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 1100mAh Ni-MH replacement battery for Zodiac two-way radios including the PA2099, PA4099, PA5099, and PA5499. It slots into the same battery compartment as the original pack and connects to the same charging contacts. Voltage and chemistry match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePA2099 \/ PA4099 \/ PA5099 \/ PA5499 platform fit:\u003c\/strong\u003e\n    These Zodiac models share the same 12V Ni-MH battery format, contact layout, and BMS handshake protocol. One replacement pack covers the full series without adapters or modifications.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through charge and transmit cycles on a Zodiac-series radio. The BMS accepted the dock handshake on first insertion, and voltage held steady under repeated PTT press load spikes throughout testing.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle contact check:\u003c\/strong\u003e\n    Ni-MH cells ship at partial charge and the contact strip can carry a fine oxide film from storage. Before first charge, wipe the gold battery contacts with a dry cloth, seat the pack firmly in the dock, and confirm the charge indicator activates — this clears any contact resistance that prevents the dock from reading the pack correctly.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the PA2099 cuts out mid-transmission on a freshly charged pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells have a steeper voltage sag curve than Li-ion under transmit current spikes. When you press PTT, the radio draws a sharp burst of current that can momentarily pull cell voltage below the BMS low-voltage cutoff threshold — even when the pack reads as fully charged at rest. This is more likely if the pack has been stored discharged for an extended period, as internal impedance rises. A full conditioning cycle — one complete charge followed by normal use to depletion — lowers cell impedance and reduces the sag response.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator drops one bar immediately after inserting a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Ni-MH cells leave the factory at storage voltage, not full charge. The radio reads that resting voltage and maps it to one fewer bar on the indicator — this is normal voltage-threshold behaviour, not a fault with the pack. Place the battery in the charger dock before use and let it complete a full charge cycle. Once the dock confirms charge complete and the pack reaches rated voltage, the bar indicator will reflect actual capacity correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426319499354,"sku":"BWCS-SHC130TW-1","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426319532122,"sku":"BWCS-SHC130TW-2","price":54.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426319564890,"sku":"BWCS-SHC130TW-3","price":60.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SHC130TW-1.webp?v=1779930680","url":"https:\/\/batteryweb.com\/products\/zodiac-pa2099-replacement-battery-12v-1100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}