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

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

Iwatsu DC-PS8 Compatible Battery 3.7V 1050mAh Li-ion

Up to 21% off
New arrival
From $22.99 USD $28.99
Shipping calculated at checkout.
Fits Iwatsu DC-PS8 two-way radio, replaces OEM battery DC-PS8.
3.7V, 1050mAh lithium-ion delivers full transmit power on sustained RF output without voltage sag.
Connector seats flush into DC-PS8 radio slot with positive terminal forward and mechanical locking tab engaged.
Bench testing showed clean BMS acceptance on first insertion into standard Iwatsu charger dock without fault LED.
If charger dock shows fault LED on first insertion, remove battery, wipe gold contact strip with dry cloth, and reseat firmly — the Iwatsu platform requires clean contact cycle to accept 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

1050mAh

IWATSU DC-PS8 — 3.7V Li-ion Replacement Battery

This 3.7V, 1050mAh Li-ion battery replaces the original pack in the IWATSU DC-PS8 two-way radio. It fits the DC-PS8 directly, matching the original voltage rail and physical form factor. No OEM part number is published for this pack — the DC-PS8 is the sole confirmed fit model.

  • DC-PS8 platform fit: The DC-PS8 uses a compact 3.7V single-cell architecture common to slim handheld business radios. This battery matches that voltage rail and the original connector orientation, so the BMS handshake with the charger dock proceeds the same way as the factory pack.
  • Bench tested on actual hardware: We cycled this battery through transmit loads and monitored the BMS cutoff behaviour. The protection circuit held within the expected voltage window under sustained PTT draws, and the cell recovered cleanly after each discharge cycle.
  • First insertion into the charger dock: If the dock shows a fault LED on first insertion, remove the battery, wipe the contact pads with a dry cloth, and reseat firmly. The DC-PS8 charger requires a clean contact cycle to recognise the new BMS before it starts charging.

Why the DC-PS8 cuts out mid-transmission on a new battery

A new Li-ion cell ships at storage voltage — typically 3.6–3.7V — not a full charge. When PTT is pressed, transmit current spikes sharply. If the cell hasn't been fully charged first, that spike can pull terminal voltage below the BMS cutoff threshold, dropping the radio mid-transmission. This is not a faulty battery. Charge the pack fully before the first use cycle and the cutout behaviour stops.

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

The DC-PS8 uses simple voltage-threshold bar indicators — each bar corresponds to a voltage band. A new pack at storage voltage sits at the lower end of the display range, so the radio shows one fewer bar even though the cell is not depleted. This is not a capacity fault. Run the battery through one full charge cycle and the indicator will reflect the correct charge level at approximately 4.1–4.2V.

Compatible Models

DC-PS8

Technical Specifications

Voltage3.7V
Amp Hours1050mAh
Capacity1050mAh
Rate3.89Wh
Net Weight24g /0.85 oz
Gross Weight49g /1.73 oz
Approximate Weight49g /1.73 oz
Dimension 53.20 x 35.30 x 7.10mm

Product Highlights

  • Brand: IWATSU
  • 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 DC-PS8 drops audio and cuts out exactly when I press PTT — is the new battery causing this?

Yes, and it's a known behaviour with a new cell. Li-ion batteries ship at storage voltage, and the transmit current spike when PTT is pressed can pull the terminal voltage below the BMS cutoff threshold before the pack has been fully charged. This isn't a fault with the battery. Charge it fully first, then test — the cutout will stop once the cell is at full voltage.

The charger dock flashes a fault LED every time I insert the new battery, but the original pack charges fine — what's wrong?

The DC-PS8 charger checks for a valid BMS handshake on insertion. If the contact pads on the battery or dock are even slightly contaminated, the dock rejects the pack and shows a fault LED. Remove the battery, wipe the gold contacts on both the battery and the dock with a dry cloth, then reseat firmly with the radio off. The dock should accept the pack and begin charging on the next insertion.

After a full day on standby, the DC-PS8 shows a weaker signal bar than it did this morning — is the battery draining too fast?

The bar indicator on the DC-PS8 drops one threshold band as voltage falls under light standby load — this is normal voltage sag, not accelerated drain. Li-ion cells lose a measurable portion of charge under continuous low-draw standby over a full shift, and the voltage-threshold display reflects that directly. Check the terminal voltage with a multimeter: if it reads above 3.6V after a full day of standby, the cell is performing within spec. Recharge at end of shift rather than leaving the pack to sit at low voltage overnight.

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 UV-3R Replacement Battery, 3.7V, 1050mAh, 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