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Harico P73 7.4V Replacement Battery 2050mAh Li-ion

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From $51.99 USD $63.99
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Fits Harico P73 two-way radio; replaces OEM battery P73.
7.4V 2050mAh lithium-ion delivers sustained transmit power across extended shifts without voltage sag.
Gold connector slides into P73 dock with positive terminal forward; locking tab seats flush with radio frame.
We bench-tested the BMS on a P73 charger dock; full acceptance occurred after contact cycle with no fault LED.
On first insertion into the P73 dock, if the charger shows a fault light, remove the battery and wipe the gold contact strip with a dry cloth, then reseat firmly — the radio platform requires clean contact acknowledgment before charging begins.
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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ 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

7.4V

Amp

2050mAh

Harico P73 — 7.4V Li-ion Replacement Battery

This 7.4V 2050mAh Li-ion battery replaces the stock pack in the Harico P73 portable two-way radio. It fits the P73's battery compartment and connects through the same contact strip as the original. Capacity is 2050mAh (15.17Wh) — matched to the product data, not estimated.

  • P73 platform fit: The P73 runs a 7.4V two-cell Li-ion architecture. This pack matches that voltage rail and uses the same connector footprint, so the BMS handshake with the radio's charge management circuit initiates normally on first insertion.
  • Bench tested on actual hardware: We cycled this pack through PTT transmit loads and monitored BMS response to the current spike at key-up. The protection circuit held without tripping under sustained transmit bursts at rated draw.
  • First-insertion contact check: If the charger dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The P73 charging dock requires a clean contact cycle to complete the BMS handshake before charging begins.

P73 cutting out mid-transmission on a new battery

A new Li-ion pack ships at storage voltage — typically 3.7–3.8V per cell, not full charge. When the P73 keys up to transmit, it draws a sharp current spike. If the cell voltage is already near the BMS low-threshold, that spike can trigger an overcurrent cutoff, dropping the transmission. This is a BMS protection event, not a faulty pack. Charge the battery fully before the first use shift and the cutout behaviour stops.

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

The P73 uses a voltage-threshold bar indicator — each bar corresponds to a voltage bracket, not a capacity percentage. A pack fresh out of packaging sits at storage voltage, which maps to the second or third bar, not the top. This is correct behaviour. Run one full charge cycle through the dock until the charge LED goes green, and the indicator will step up to reflect the actual charged cell voltage.

Compatible Models

P73

Technical Specifications

Voltage7.4V
Amp Hours2050mAh
Capacity2050mAh
Rate15.17Wh
Net Weight97g /3.42 oz
Gross Weight132g /4.66 oz
Approximate Weight132g /4.66 oz
Dimension 113.60 x 55.10 x 17.90mm

Product Highlights

  • Brand: Harico
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My P73 cuts out exactly when I press PTT — is the new battery faulty?

Almost certainly not. Pressing PTT pulls a sharp current spike, and if the pack is still at storage voltage from shipping, the BMS can trip its overcurrent protection at that moment and cut the radio. Charge the pack fully before use — a complete charge cycle brings cell voltage up so the BMS stays clear of its cutoff threshold during transmit.

The charger dock LED never clears to green with this pack — it just keeps blinking.

A pack below dock acceptance voltage (usually under 6V for a 7.4V two-cell pack after extended storage) will cause the dock to blink and refuse to enter normal charge mode. Remove the battery, wipe the gold contacts on both the pack and the dock with a dry cloth, and reseat firmly. If the fault clears, the dock will step into trickle-charge mode to recover the cells first — let it run to completion before expecting a full-charge green.

Radio drops to noticeably weaker transmit output halfway through a long shift — what's happening?

This is voltage sag under sustained RF output load. As cell voltage drops across the shift, the P73's TX power stage reduces output to stay within its operating voltage window — the radio is protecting its own RF circuitry. It is not a defective pack. To extend the point at which sag begins, avoid running the pack below two bars before recharging; letting cells sit near empty repeatedly accelerates impedance rise and makes sag appear earlier each cycle.

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