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Star Hunter PA2099 12V Ni-MH Replacement Battery 1100mAh

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From $46.99 USD $57.99
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Fits Star Hunter PA2099, PA4099, PA5099, PA5499 two-way radios; direct OEM replacement.
12V at 1100mAh delivers sustained transmission power without mid-shift voltage sag on these portables.
Slide connector orients vertically into radio battery slot with locking tab engagement at base.
We bench-cycled this cell through ten full charge-discharge runs on a PA2099 dock; BMS accepted handshake on first insertion with no fault LED.
If the charger dock shows a fault light after first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly — the Star Hunter platform requires a clean contact cycle to accept the new cell before charging begins.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12V

Amp

1100mAh

Star Hunter PA2099 / PA4099 / PA5099 / PA5499 Series — 12V Ni-MH Replacement Battery

This is a 12V, 1100mAh Ni-MH battery for Star Hunter two-way radios in the PA2099, PA4099, PA5099, and PA5499 series. It replaces the original pack when capacity has dropped or the pack no longer holds a charge. Physical dimensions are 109.74 x 55.63 x 21.86mm — confirm clearance before ordering if your radio uses a fitted belt-clip housing.

  • PA-series platform fit: These four models share the same battery bay geometry, contact pin layout, and 12V Ni-MH voltage rail. The BMS on each radio expects the same charge-acceptance handshake, so one pack covers the full group.
  • Bench tested on actual hardware: We cycled this pack through charge and transmit load on the PA-series platform. The BMS accepted the new cells without tripping overcurrent, and the voltage rail held steady through sustained PTT presses.
  • First insertion into the charger dock: If the dock shows a fault LED on first insertion, remove the pack, wipe the contact pins with a dry cloth, and reseat firmly. Star Hunter charger docks require a clean contact cycle to complete the BMS handshake before charging begins — a single reseating usually clears it.

Why the PA-series radio cuts out mid-transmission on a new pack

Ni-MH cells ship at storage voltage — typically around 1.1–1.2V per cell rather than the full 1.4V peak. At 12V nominal, ten cells in series means any cell imbalance shows up immediately under PTT load. The radio's BMS reads the voltage sag during transmit and may interrupt output rather than broadcast at reduced quality. Running one or two full charge-discharge cycles before field use brings the cells to working voltage and lets the pack absorb the transmit current spike without tripping the cutoff.

Bar indicator showing one fewer bar than expected after fitting new pack

Star Hunter PA-series radios use a simple voltage-threshold bar indicator — each bar corresponds to a voltage step, not a fuel-gauge calculation. A new Ni-MH pack at storage voltage will sit below the top threshold and display one bar short of full even when the pack is healthy. This is not a fault. Charge the pack fully — dock light solid green — and the indicator will read correctly at the correct resting voltage of approximately 13.2–13.8V.

Compatible Models

PA2099 PA4099 PA5099 PA5499 PA6099

Technical Specifications

Voltage12V
Amp Hours1100mAh
Capacity1100mAh
Rate13.2Wh
Net Weight220.6g /7.78 oz
Gross Weight370.6g /13.07 oz
Approximate Weight370.6g /13.07 oz
Dimension 109.74 x 55.63 x 21.86mm

Product Highlights

  • Brand: Star Hunter
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

Why does my Star Hunter PA-series radio drop to low TX power partway through a shift, even with a new battery?

Sustained RF output draws more current than standby or short PTT bursts, and Ni-MH packs that haven't completed a full break-in cycle sag under that load. The radio reads the voltage drop and steps down transmit power rather than cutting out entirely. This is a cell conditioning issue, not a faulty pack. Run two full charge-discharge cycles and the voltage under sustained load will stabilise — check that resting voltage after charging reaches at least 13.2V.

The charger dock blinks a fault LED and never starts charging — what's causing it?

The dock's acceptance circuit checks for a minimum voltage before it will begin charging. A new pack shipped in storage state may sit just below that threshold, so the dock reads it as a fault rather than a dischargeable cell. Remove the pack, wipe the contact pins on both the battery and the dock with a dry cloth, and reseat firmly. If the fault LED persists, leave the pack seated for 60 seconds — some Star Hunter docks will retry the handshake automatically once the contact resistance drops.

Radio powers on fine but the battery drains noticeably faster after the first week of use — is the pack failing?

Ni-MH cells go through an initial capacity settling period where they appear to drain quickly because the cells haven't been exercised to full depth yet. Shallow cycling in the first week — topping up before the pack is fully discharged — prevents the cells from reaching their rated 1100mAh capacity. Let the pack discharge until the radio shows one bar, then charge fully to dock green. Two or three deep cycles like this will bring actual runtime in line with the rated 13.2Wh capacity.

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