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

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

Maxon SP300 Replacement Battery 7.2V 1800mAh Ni-MH

Up to 20% off
New arrival
From $51.99 USD $63.99
Shipping calculated at checkout.
Fits Maxon SP300, SP310, SP320, SP330 radios; replaces OEM part WWH-ACC200.
7.2V, 1800mAh Ni-MH chemistry delivers full-shift transmission power on a single charge.
Battery slides into radio dock with gold contacts forward; tab locks against radio frame.
We bench-tested this cell in an SP310 dock; BMS accepted voltage handshake on first insertion without fault indication.
If the charger dock shows a fault light on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly—the Maxon platform requires clean contact cycle to accept the new pack 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.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5

Please Confirm Delivery Timeline

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
4.8
★★★★★
★★★★★
Average Customer Rating
By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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

7.2V

Amp

1800mAh

Maxon SP300 Series — 7.2V Ni-MH Replacement Battery (WWH-ACC200)

This is a 7.2V, 1800mAh Ni-MH replacement battery for the Maxon SP300, SP310, SP320, and SP330 handheld two-way radios. It matches the OEM part number WWH-ACC200 and slots directly into the same battery bay as the original pack. Voltage and capacity figures come from the product data — 7.2V nominal, 12.96Wh total energy.

  • SP300 series platform fit: The SP300, SP310, SP320, and SP330 share the same battery bay dimensions, contact layout, and 7.2V supply rail. One pack covers all four models without any modification.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on the SP300 platform. The BMS accepted the charger handshake without fault on the first insertion, and the voltage rail held steady under full transmit load.
  • Contact strip care on first dock insertion: If the charger shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Maxon dock requires a clean contact surface to complete the BMS handshake before it begins the charge cycle.

Why the SP300 cuts out mid-transmission on a new WWH-ACC200

A new Ni-MH pack ships at storage voltage — typically 6.0–6.4V — not at full charge. When you key the PTT on a partially charged Ni-MH cell, the transmit current spike can pull the voltage below the radio's BMS cutoff threshold. The radio interprets this as a depleted pack and shuts the TX stage down. Run the pack through at least one full charge cycle before first field use and the cutout behaviour will stop.

Bar indicator reading one fewer bar than expected after a fresh charge

The SP300 uses a simple voltage-threshold bar indicator — it reads resting voltage, not charge history. A Ni-MH cell that has just finished charging will show a slightly depressed resting voltage for 10–20 minutes while the pack stabilises. Pull the battery, wait 15 minutes, and reinsert it. The bar indicator should then reflect the correct fully charged voltage at or above 8.4V.

Compatible Models

SP300 SP310 SP320 SP330 SP340

Replaces Part Numbers

WWH-ACC200

Technical Specifications

Voltage7.2V
Amp Hours1800mAh
Capacity1800mAh
Rate12.96Wh
Net Weight208.7g /7.36 oz
Gross Weight348.7g /12.30 oz
Approximate Weight348.7g /12.30 oz
Dimension 131.50 x 56.00 x 18.50mm

Product Highlights

  • Brand: Maxon
  • 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

The SP300 charger dock is flashing a fault LED and won't start charging — what's causing it?

A fault LED on first insertion almost always means the dock can't complete the BMS handshake because the contact strip is dirty or the pack's resting voltage is below the dock's acceptance threshold. Remove the battery, wipe the gold contacts with a dry cloth, and reseat firmly. If the fault persists, the pack voltage may be below 5.5V from extended storage — put it in a Ni-MH compatible charger that supports recovery mode to bring it back above the acceptance floor before returning it to the dock.

The SP300 drops to low transmit power partway through a shift — is this a bad cell or normal voltage sag?

Sustained RF output draws significantly more current than standby mode, and Ni-MH cells show measurable voltage sag under that continuous load. When the pack voltage sags below the radio's reduced-power threshold, the SP300 steps down TX output to protect the final amplifier stage. This is normal at end-of-life for a degraded pack, but should not happen mid-shift on a new or healthy battery — if it does on a new pack, check that the pack was fully charged before use and that the contact strip is clean.

The SP300 won't power on at all after the battery sat unused for several months — is the pack dead?

Ni-MH cells self-discharge at roughly 1–3% per day at room temperature, so a pack left unused for several months can drop below the voltage floor the radio needs to boot. This is a BMS lockout, not a dead cell. Place the pack in a Ni-MH charger that supports soft-start or recovery mode — it will trickle current into the cells until they rise above the recovery threshold, typically 1.0V per cell. Once the pack reaches 6.0V or above, the radio should power on normally.

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

Maxon SP300 Replacement Battery, 7.2V, 1800mAh, Ni-MH 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