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

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

A32-R1 Asus R1 Replacement Battery 11.1V 4400mAh

Up to 19% off
New arrival
From $67.99 USD $83.99
Shipping calculated at checkout.
Fits Asus R1, R1F, R1E, and R1 Tablet PC — replaces OEM part A32-R1, 90-NGA1B3000, and 70-NGA1B1001M.
11.1V and 4400mAh capacity restores full charge cycles on this ultraportable Asus notebook without voltage sag during CPU load.
Connector slides straight into the battery bay slot with a single locking tab — orientation is keyed, no force needed.
We bench-tested this cell in an R1F against sustained CPU and display draw; BMS held 11.1V throughout discharge without cutoff errors.
After installation, run one full discharge to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
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

11.1V

Amp

4400mAh

Asus R1 / R1F / R1E Tablet PC — 11.1V Li-ion Replacement Battery (A32-R1)

This is an 11.1V, 4400mAh (48.84Wh) lithium-ion battery for the Asus R1, R1F, and R1E Tablet PC. It replaces OEM part numbers A32-R1, 90-NGA1B3000, and 70-NGA1B1001M. If the original cell is failing to hold charge or triggering low-battery shutdowns, this is the direct replacement.

  • R1 series compatibility: The R1, R1F, and R1E all share the same battery bay dimensions, connector pinout, and BMS communication protocol — the BIOS handshake is identical across this platform, so one cell covers the full lineup.
  • Bench tested on actual hardware: We ran charge and discharge cycles on the R1 platform and confirmed the BMS negotiates correctly at all three pins — the cell reports voltage, temperature, and state-of-charge without triggering an unknown battery error.
  • Post-install calibration on the R1: After fitting this cell, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

Why the R1 reports poor battery health immediately after a cell swap

The Asus R1 BIOS reads health data from EEPROM registers that were written by the original factory cell during its lifetime. A new cell arrives with fresh EEPROM values that don't match the usage history the BIOS expects. Until the system runs a full learn cycle, it flags the battery as degraded or unknown — even though the cell is new. One complete discharge-to-hibernate followed by an uninterrupted full charge rewrites the learn-cycle registers and clears the warning.

R1 shutting down at 20–30% charge shown on the gauge

This is a voltage-cliff issue, not a gauge error. Under combined CPU and display load the cell voltage drops faster than the fuel gauge IC can track, and the BIOS triggers an emergency shutdown before the displayed percentage reaches zero. It happens most often on the R1's convertible tablet mode where the display brightness is high. Run two full calibration cycles — discharge fully to hibernate, then charge to 100% — so the fuel gauge IC maps the new cell's actual voltage curve. After calibration, shutdowns at falsely high percentages stop.

Compatible Models

R1 R1F R1E R1 Tablet PC

Replaces Part Numbers

A32-R1 90-NGA1B3000 70-NGA1B1001M

Technical Specifications

Voltage11.1V
Amp Hours4400mAh
Capacity4400mAh
Rate48.84Wh
Gross Weight150g /5.29 oz
Approximate Weight150g /5.29 oz
Dimension 124.55 x 73.85 x 19.70mm

Product Highlights

  • Brand: Asus
  • 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 Asus R1 BIOS shows the new battery as 0% health or "unknown" — is the cell faulty?

The cell is not faulty. The R1 BIOS reads health status from EEPROM data written by the original cell, and a fresh replacement arrives with registers the BIOS doesn't recognise yet. Run one full discharge to hibernate-cutoff, then charge uninterrupted to 100% — this completes the BIOS battery learn cycle and overwrites the stale EEPROM flags. After one cycle the health status should update to a normal reading.

Windows is showing a Wh rating on the R1 that doesn't match the 48.84Wh spec — what's going on?

The Wh figure Windows displays is pulled from the cell's EEPROM-stored design capacity, which can differ slightly from the chemistry-rated value on the label until the fuel gauge IC has logged actual charge and discharge data. This is an EEPROM reporting difference, not a capacity defect. Run two full calibration cycles and the reported Wh figure will converge toward the rated 48.84Wh as the fuel gauge IC builds an accurate model of the new cell.

The R1's charge stops climbing and holds at roughly 80% — why won't it reach 100%?

Some Asus BIOS versions include a charge-limit setting that caps charging at 80% to reduce long-term cell stress — it is a firmware control, not a battery fault. Open the Asus Battery Health Charging utility (or check BIOS power settings) and switch the mode from "Balanced" or "Maximum Lifespan" to "Full Capacity." Once that setting is changed, plug in the adapter and the charge will continue past 80% to 100%.

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

Asus R1 Replacement Battery, 11.1V, 4400mAh, 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