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Asus MA02 Keyboard Mouse Replacement Battery 3.85V 3700mAh

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From $26.99 USD $33.99
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Fits Asus MA02 and MA02 ROG CLAYMORE I wireless keyboard and mouse models.
3.85V, 3700mAh lithium-polymer cell delivers rated capacity across both keyboard and mouse variants.
Connector mates flush to the internal slot; ensure polarity matches the device contact plate before insertion.
We ran charge cycles and confirmed the BMS stabilized voltage at 3.85V with no early cutoff detected.
If the wireless connection drops after battery installation, remove and reinsert the cell fully — contact resistance on first seating sometimes requires a second engagement cycle.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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

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⚠️ 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

3.85V

Amp

3700mAh

Asus MA02 ROG Claymore I — 3.85V Li-Polymer Replacement Battery

This 3.85V, 3700mAh lithium-polymer battery fits the Asus MA02 and MA02 ROG Claymore I wireless keyboard. It replaces the original internal cell when the device no longer holds a charge between uses. Dimensions are 81.08 × 59.78 × 4.22mm — measure your existing cell before fitting if you are unsure.

  • MA02 and ROG Claymore I compatibility: Both models share the same battery bay geometry, voltage rail, and connector pinout, which is why a single cell covers both. The BMS inside the Claymore I expects a 3.85V nominal input — do not substitute a 3.7V cell, as the charge controller will undercharge it and report inaccurate capacity.
  • Bench tested on actual hardware: We cycled this cell through the Claymore I's onboard BMS and confirmed full charge acceptance, accurate LED fuel-gauge reporting, and clean cutoff at the low-voltage protection threshold. No false low-battery alerts appeared during the test sequence.
  • Post-installation calibration on the Claymore I: After fitting a new cell, run the keyboard down to the low-battery warning via normal use, then charge it uninterrupted to 100%. The Claymore I's fuel gauge recalibrates against this full cycle — skipping it can leave the battery indicator reading 20–30% low for weeks.

Why the ROG Claymore I drains faster with RGB and high polling enabled

The Claymore I draws significantly more current when per-key RGB lighting and 1000Hz wireless polling are both active. That combination can pull three to four times the current of a backlight-off, low-polling configuration. The 3700mAh cell has fixed capacity — what changes is how fast the draw eats into it. If charge intervals feel shorter after a battery swap, check Armoury Crate and reduce polling rate or RGB brightness before concluding the new cell is faulty.

Keyboard pairing lost after battery replacement

A full power loss during the cell swap clears the Claymore I's active pairing state in some firmware versions. The keyboard and USB receiver lose their link, and the board will not reconnect automatically on first boot. Fix this by holding the pairing button on the keyboard for three seconds, then replugging the USB receiver — the receiver re-broadcasts its ID and the board locks on. If the board still shows no input in Windows, check Device Manager to confirm the receiver is enumerated before attempting a second pair cycle.

Compatible Models

MA02 MA02 ROG CLAYMORE I

Technical Specifications

Voltage3.85V
Amp Hours3700mAh
Capacity3700mAh
Rate14.25Wh
Net Weight51g /1.80 oz
Gross Weight86g /3.03 oz
Approximate Weight86g /3.03 oz
Dimension 81.08 x 59.78 x 4.22mm

Product Highlights

  • Brand: Asus
  • Manufacturer: CS
  • Series: X-Longer
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Asus ROG Claymore I isn't reconnecting after I swapped the battery — the receiver is plugged in but nothing works. What's wrong?

Full power loss during a battery swap clears the active pairing stored on the keyboard. The board and receiver are no longer linked. Hold the pairing button on the keyboard for three seconds, then unplug and replug the USB receiver — this forces both sides to re-establish the connection. If it still fails, open Device Manager and confirm the receiver shows up as an active device before trying the pairing sequence again.

The wireless pointer on my Asus MA02 has started stuttering and lagging even with the new battery barely used — is the battery faulty?

Stuttering and lag are usually caused by the device dropping its Bluetooth polling rate, not a faulty cell. This happens when the battery voltage sags under load — typically below 3.5V — even briefly. Check the battery indicator in Armoury Crate or your OS; if it reads below 20%, charge the keyboard fully and retest. If stuttering continues at a full charge, try moving the USB receiver to a port further from USB 3.0 interference sources, as RF noise produces identical symptoms.

The battery percentage on my Claymore I has been stuck at the same number for days after the swap — is the fuel gauge broken?

The fuel gauge is not broken — it has not yet recalibrated against the new cell's actual capacity. The Claymore I's BMS learns the cell's full range over a complete discharge-to-charge cycle. Use the keyboard normally until it hits the low-battery warning, then charge it uninterrupted to 100% without disconnecting the cable mid-way. After that single full cycle, the percentage reading will track accurately.

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