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

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

DALLAB DP900 Replacement Battery 3.7V 2600mAh Li-ion

Up to 20% off
New arrival
From $32.99 USD $40.99
Shipping calculated at checkout.
Fits DP900 and xg 500p handhelds; replaces GB/T18287-2000 original battery.
3.7V, 2600mAh cell delivers 9.62Wh for sustained PDA operation and wireless scanning tasks.
Connector matches OEM slot orientation; verify seating until locking tab engages fully.
Bench testing showed clean voltage ramp on first charge with stable BMS handshake throughout discharge cycle.
Sync all open files and application data to your host computer before removing the old battery — PDA RAM loses power immediately when the cell is withdrawn, erasing unsaved work.
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

2600mAh

DALLAB DP900 / xg 500p — 3.7V Li-ion Replacement Battery (GB/T18287-2000)

This is a 3.7V, 2600mAh (9.62Wh) Li-ion battery for the DALLAB DP900 and xg 500p handheld PDA units. It replaces the original cell when capacity fade makes the device unusable through a full work shift. Fits the standard battery bay with no modification.

  • DP900 and xg 500p compatibility: Both units run the same 3.7V single-cell architecture and share the GB/T18287-2000 form factor. The connector pinout and BMS communication protocol match across this platform, so the same cell covers both models.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on PDA-class test rigs. The onboard BMS handled thermal monitoring correctly and cut off at the expected low-voltage threshold without locking the charge circuit.
  • Sync before you swap: PDA devices like the DP900 hold open files and application state in RAM powered directly by the main battery. Pull the cell without syncing to a host first and that unsaved data is gone. Do a full host sync before removing the battery.

Why the DP900 won't boot after a new battery is installed

A brand-new Li-ion cell ships at a storage charge — typically around 3.0V to 3.3V. The DP900 boot sequence requires a minimum voltage threshold before it will initialise the OS. If you drop a fresh cell in and press power with no result, the battery is not faulty — it just hasn't been charged yet. Connect to a charger for at least 30 to 60 minutes before attempting to boot, and the unit should respond normally.

Battery indicator reading full but device dying mid-scan

The DP900's fuel gauge calibration is tied to the original cell's discharge curve. After swapping to a new battery, the gauge can report inaccurate percentages until it completes one full charge-discharge cycle. Meanwhile, the barcode scanner LED and active wireless radio draw significantly more current than standby, which can trigger the low-voltage cutoff faster than the gauge suggests. Run one complete charge from flat to full, then discharge under normal scanning load, and the indicator will recalibrate to reflect actual remaining capacity.

Compatible Models

DP900 xg 500p

Replaces Part Numbers

GB/T18287-2000

Technical Specifications

Voltage3.7V
Amp Hours2600mAh
Capacity2600mAh
Rate9.62Wh
Gross Weight100g /3.53 oz
Approximate Weight100g /3.53 oz

Product Highlights

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

Frequently Asked Questions

My DP900 lost all my open data when I swapped the battery — is that normal?

Yes, and it is a known characteristic of SRAM-based PDA storage. The DP900 holds active application state and unsaved data in RAM that is powered continuously by the main battery. The moment the cell is removed, that RAM loses power and the data is gone. Always perform a full sync to the host computer before pulling the battery — that is the only way to protect open files.

The DP900 screen stays black after fitting the new battery — what do we check first?

New Li-ion cells ship at storage voltage, usually 3.0–3.3V, which is below the minimum the DP900 boot sequence needs to initialise. We see this on the bench regularly — it is not a fault with the unit or the battery. Charge the device for at least 30–60 minutes before pressing the power button, and it should boot normally. If it still won't respond after a full charge, check that the battery contacts are clean and fully seated.

Wireless sync keeps dropping on the DP900 since I installed a new battery — why?

The DP900's radio draws a sharp burst of current during active sync, and this can cause a voltage sag if the new cell hasn't been properly conditioned yet. We found that cells fresh out of the box can show brief voltage dips under radio load until they've completed at least one full charge cycle. Run the battery to full charge, let it discharge under normal use, then charge to full again. After that conditioning cycle, check that the unit reads at least 3.7V before attempting a wireless sync session.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • 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

Lenovo ET280 Replacement Battery, 3.7V, 2600mAh, 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