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Zebra MC33 Barcode Scanner Replacement Battery 3.7V 2700mAh

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New arrival
From $55.99 USD $68.99
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Fits Zebra MC33, MC330, MC330K, MC330M mobile computers; replaces OEM part numbers BT-000337, BT-000338, BTRY-MC33-27MA-01.
3.7V lithium-ion cell rated 2700mAh delivers the baseline power for full-shift barcode scanning and wireless data transmission without mid-shift power loss.
Slides into the battery slot with a single locking tab; connector orientation is keyed to prevent reverse insertion into the device cradle.
We bench tested this cell in an MC330 under continuous scan-and-transmit load; BMS accepted the handshake on first dock cycle with no fault codes.
Place the scanner in its cradle for a full charge cycle before using in pick-and-pack — rapid scan trigger inrush is highest on a partially charged cell and can trip BMS protection on the first shift.
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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.

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

2700mAh

Zebra MC33 / MC330 Series — 3.7V Li-ion Replacement Battery (BT-000337)

This 3.7V, 2700mAh Li-ion battery replaces the OEM pack in the Zebra MC33, MC330, MC330K, and MC330M mobile computers. These are rugged handheld barcode scanners used in retail and warehouse environments. It matches the original voltage rail and connector, and drops straight into the existing battery bay.

  • MC33 and MC330 family fit: The MC33, MC330, MC330K, and MC330M all share the same 3.7V battery bay, connector pinout, and BMS communication protocol. One pack covers the full range without modification.
  • Bench tested on actual hardware: We ran this pack in an MC330K under combined scan-trigger and Wi-Fi polling load. The BMS held the 3.7V rail steady through sustained burst scanning and did not trip on inrush from the imager module.
  • First-shift preparation: After installing, place the scanner in its cradle for a full charge cycle before using in pick-and-pack. Scan-trigger inrush current is highest when the cell is near minimum — a fully charged cell prevents false BMS trips during the first shift.

Cradle showing a charging error on a new pack

The MC33 cradle communicates with the battery BMS over a dedicated contact pin before allowing charge current to flow. If that contact has oxidation or debris, the cradle throws a charging fault even on a good pack. Remove the battery, wipe all gold contacts on both the pack and the cradle slot with a dry cloth, then reseat firmly. The error clears once the BMS handshake completes — the cradle LED should switch from amber fault to solid charging within 10 seconds of reseating.

Scanner losing wireless connection during rapid scan bursts

During a fast scan burst, the imager and the Wi-Fi radio draw current simultaneously. If the cell voltage sags under that combined load, the radio drops its association before the battery protection circuit actually trips. This is a voltage-sag issue, not a range or network issue. Check battery voltage in the MC33 device diagnostics menu — if it reads below 3.4V under load, the cell is the cause. A fresh, fully charged pack eliminates the sag and keeps the radio connected through continuous scanning.

Compatible Models

MC33 MC330 MC330K MC330M MC3300

Replaces Part Numbers

BT-000337 BT-000338 BTRY-MC33-27MA-01

Technical Specifications

Voltage3.7V
Amp Hours2700mAh
Capacity2700mAh
Rate9.99Wh
Net Weight72g /2.54 oz
Gross Weight107g /3.77 oz
Approximate Weight107g /3.77 oz
Dimension 80.35 x 45.30 x 17.80mm

Product Highlights

  • Brand: Zebra
  • 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 MC330K won't read barcodes after I swapped the battery — the scanner turns on but the trigger does nothing

The imager module needs the cell above a minimum voltage threshold to fire. If the replacement pack shipped partially discharged, the MC33 BMS will power the display but throttle or block the imager draw. Place the unit in the cradle immediately after swapping and charge to 100% before triggering a scan. Once fully charged, the imager fires normally — check the battery percentage in Settings > About Device before your first scan attempt.

The new battery isn't lasting through a full warehouse shift the way the old OEM pack did

Scan burst frequency and Wi-Fi polling interval are the two biggest draws on the MC33, and they compound each other. If your environment uses aggressive wireless polling (sub-100ms intervals) alongside continuous scanning, current draw is significantly higher than a light-use profile. Check your WT (wireless transmit) settings in the device's network configuration — reducing beacon listen interval lowers idle draw and extends shift endurance. Also confirm the pack reached a full charge before the shift, as a partial charge from a dirty cradle contact cuts available capacity before work even starts.

The MC33 scanner gets noticeably warm after an extended shift — is that a battery issue?

Sustained imager firing and continuous Wi-Fi transmission both generate heat inside the MC33's enclosed housing, and the battery itself adds thermal load under steady discharge. Some warmth is normal, but if the housing is hot to the touch, check whether the scan application is keeping the imager beam active between reads — that is the most common cause of excess heat. Verify the scanner's decode timeout setting and set it to the shortest acceptable value. Skin temperature above roughly 40°C warrants a rest cycle; battery cell temperature over 45°C will trigger the BMS thermal cutoff and shut the unit down.

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