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Inrico B01 Replacement Battery 3.7V 1700mAh Li-ion B-50C

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From $47.99 USD $59.99
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Fits Inrico B01 and B02 two-way radios, replaces OEM part number B-50C.
3.7V lithium-ion at 1700mAh delivers consistent transmit voltage throughout your shift without sag-induced power drops.
Connector slides into the standard Inrico battery slot with a firm click; locking tab engages automatically on full insertion.
We bench-tested this cell on the B01 radio under sustained PTT cycles; BMS accepted the pack on first dock insertion with no fault indication.
On first use with the B01 charger, if the dock LED shows amber instead of green after ten minutes, remove the battery and wipe both gold contact strips with a dry cloth before reinserting—the Inrico platform needs clean contact confirmation to complete the BMS negotiation.
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.

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.

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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

3.7V

Amp

1700mAh

Inrico B01 / B02 — 3.7V Li-ion Replacement Battery (B-50C)

This is a 3.7V, 1700mAh lithium-ion replacement battery for the Inrico B01 and B02 portable two-way radios. It uses OEM part number B-50C and slots directly into the battery bay on both models. Voltage and cell format match the original pack specification.

  • B01 and B02 compatibility: Both radios run on the same 3.7V single-cell platform and share the B-50C form factor — same connector pinout, same BMS handshake voltage window, same physical envelope at 52.30 × 40.00 × 10.10mm.
  • Bench tested on actual hardware: We cycled this pack through transmit and standby loads. The BMS held stable across repeated PTT events, and the protection circuit tripped correctly at the overcurrent threshold — no false lockout during normal TX bursts.
  • 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 B01 dock requires a clean contact surface to complete the BMS handshake before it begins the charge cycle.

Why the B01 cuts out mid-transmission on a freshly inserted B-50C pack

A new cell ships at storage voltage — typically around 3.6V to 3.7V, not at a full charge. When PTT is pressed, transmit current spikes sharply. If the cell is at storage voltage and the BMS sees that spike pull the cell below its undervoltage cutoff threshold, it trips and drops the radio. This is not a faulty pack — it is the BMS doing exactly what it should. Run the pack through one full charge cycle before heavy use and the issue will not repeat.

Bar indicator showing one fewer bar than expected after fitting a new B-50C

The B01 and B02 use a simple voltage-threshold bar indicator — each bar maps to a voltage band, not a fuel gauge chip. A new pack at storage voltage reads lower than a fully charged cell, so the radio displays one bar short. This is not a capacity problem. Charge the pack fully and the indicator will step up to the correct bar level — confirming the cell is sitting at or above the top voltage threshold.

Compatible Models

B01 B02

Replaces Part Numbers

B-50C

Technical Specifications

Voltage3.7V
Amp Hours1700mAh
Capacity1700mAh
Rate6.29Wh
Net Weight36g /1.27 oz
Gross Weight61g /2.15 oz
Approximate Weight61g /2.15 oz
Dimension 52.30 x 40.00 x 10.10mm

Product Highlights

  • Brand: Inrico
  • 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

The B01 dock is blinking a fault LED and won't start charging — what's wrong?

The dock fault LED usually means the pack voltage has dropped below the charger's acceptance threshold, or the contacts didn't make a clean connection on insertion. Remove the pack, wipe the gold contact strip with a dry cloth, and reseat it firmly. If the LED clears and charging begins, the contact surface was the issue. If it persists, leave the pack seated — some docks run a brief pre-charge trickle to bring a low cell up to acceptance voltage before switching to the normal charge current.

Radio drops to noticeably weaker TX output partway through a shift — is the battery failing?

This is voltage sag under sustained RF output, not pack failure. As the cell discharges, internal resistance rises and voltage drops under the load of repeated transmissions. The radio's firmware reads that voltage drop and steps down TX power to protect the circuit. Top the pack up before a long shift and avoid back-to-back extended PTT holds — this keeps the cell voltage above the sag threshold where TX power reduction kicks in.

The B-50C pack sat unused for several months and now the dock won't recognise it at all — can it recover?

Extended storage can push a lithium-ion cell below the BMS re-initialisation threshold — typically around 2.5V. At that point the BMS locks out to prevent charging a critically depleted cell. Some chargers with a trickle or recovery mode can bring the cell back up slowly; if your dock has a recovery or boost setting, activate it. If the dock shows no response at all after 30 minutes on recovery mode, the cell has dropped below the point where a standard dock can recover it and the pack will need to be replaced.

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