Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Baofeng UV3R Compatible Battery 3.7V 1200mAh BL-3

Up to 20% off
New arrival
From $25.99 USD $31.99
Shipping calculated at checkout.
Fits Baofeng UV3R, UV-3R, BF-T6, and C5 models; replaces OEM BL-3 battery pack.
3.7V, 1200mAh lithium-ion cell delivers the voltage and capacity your UV3R needs for full TX power output.
Connector slides straight into the radio's battery slot with a single locking tab; no modification required.
We ran load cycles on a bench UV3R radio; the BMS accepted the pack on first insertion with no fault delay.
If the Baofeng charger dock shows a fault LED after inserting this cell, remove and reseat — the platform needs a clean contact cycle to accept the new BMS handshake before charging begins.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

3.7V

Amp

1200mAh

Baofeng UV3R / BF-T6 — 3.7V Li-ion Replacement Battery (BL-3)

This is a 3.7V, 1200mAh Li-ion battery using Baofeng's BL-3 form factor. It fits the UV3R, UV-3R, BF-T6, and C5 handheld two-way radios. Slot it in where the original BL-3 sat and the radio powers on normally.

  • UV3R and BF-T6 platform fit: Both radios share the same BL-3 slot dimensions, 3.7V nominal rail, and contact layout. One pack covers either unit without adapters or modification.
  • Bench tested on actual hardware: We ran this pack through a transmit cycle on the UV3R. The BMS held stable through repeated PTT presses and did not trigger overcurrent cutoff under normal TX load.
  • First contact insertion on the UV3R charger cradle: If the cradle LED flashes or shows a fault on first insertion, remove the pack, wipe the three contact pads on the battery with a dry cloth, and reseat firmly. The cradle needs a clean contact cycle to read the new pack's BMS state before it begins charging.

Why the UV3R cuts out when you hold PTT on a fresh BL-3

A new BL-3 ships at storage voltage — typically around 3.6V to 3.65V, not a full 4.2V charge. When you press PTT, the UV3R draws a short current spike to drive the RF output stage. At storage voltage, internal cell impedance is slightly higher, and the BMS may interpret that spike as an overcurrent event and cut the pack. Charge the battery fully in the cradle before first transmit use. Once at 4.2V, the spike sits well within the BMS threshold and cutout stops.

UV3R bar indicator drops one bar immediately after inserting a new pack

The UV3R uses a simple voltage-threshold bar display — it reads resting cell voltage and maps it to bars. A new pack at storage voltage (around 3.6V) sits one threshold below a freshly charged cell at 4.2V, so the radio shows one fewer bar than expected. This is not a fault with the pack. Charge the battery fully in the cradle until the LED goes green, then reinsert — the indicator will read the correct bar level against the 4.2V resting voltage.

Compatible Models

UV3R UV-3R BF-T6 C5 BF-R5

Replaces Part Numbers

BL-3

Technical Specifications

Voltage3.7V
Amp Hours1200mAh
Capacity1200mAh
Rate4.44Wh
Net Weight23.5g /0.83 oz
Gross Weight48.5g /1.71 oz
Approximate Weight48.5g /1.71 oz
Dimension 53.60 x 35.60 x 6.40mm

Product Highlights

  • Brand: Baofeng
  • 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 UV3R cuts out every time I press PTT — is the new BL-3 pack faulty?

Almost always, no. The pack ships at storage voltage, around 3.6V, and the UV3R's transmit spike draws enough current at that voltage to trip the BMS overcurrent threshold. Charge the pack fully in the cradle until the LED goes green before you transmit. Once the cell is at 4.2V, the BMS threshold clears and the cutout stops.

The UV3R cradle LED keeps blinking and won't start charging the new BL-3 — what's wrong?

The cradle checks the battery contact pads before it begins a charge cycle. Oxidation or dust on the three gold pads breaks the circuit and the dock never accepts the pack. Remove the battery, wipe the contact pads with a dry cloth, and reseat firmly until you feel the clip engage. The LED should go solid within a few seconds of clean contact.

The UV3R is transmitting at noticeably lower volume and the signal sounds weak mid-conversation — is this a battery issue?

Yes — this is voltage sag under sustained RF output. As the cell discharges past roughly 3.5V under TX load, the UV3R can no longer maintain full output power and drops to a reduced level. The fix is to recharge before the bar indicator hits one bar. Running the pack down to that point regularly accelerates capacity fade, so charge when you see two bars remaining.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Baofeng UV3R Replacement Battery, 3.7V, 1200mAh, Li-ion 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections