Acer Aspire 4333 Compatible Battery 11.1V 4400mAh 31CR19/652
Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.
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Acer Aspire 4333 Compatible Battery 11.1V 4400mAh 31CR19/652 - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Acer Aspire 4333 Compatible Battery 11.1V 4400mAh 31CR19/652 - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
4400mAh
Acer Aspire 4333 / 4339 / 4349 — 11.1V Li-ion Replacement Battery (AS10D31 / 31CR19/652)
This 11.1V, 4400mAh (48.84Wh) Li-ion battery replaces the original cell in the Acer Aspire 4333, 4339, 4349, 4352, and over 535 compatible Aspire models. It fits the same physical bay, connector, and BMS handshake as the factory unit. Use it to restore portable operation to a notebook that now dies on AC removal or won't hold charge past a few minutes.
- Wide Aspire platform fit: These models share the same 11.1V three-cell rail, identical connector pinout, and the same BMS communication protocol — which is why one part number covers the full Aspire D-series and E-series lineup without modification.
- Bench tested on actual hardware: We ran this cell through charge-discharge cycles on an Aspire host and confirmed the BMS negotiates correctly — no false "unknown battery" flag, no premature cutoff, and the protection circuit tripped cleanly at the expected low-voltage threshold.
- Post-install calibration on the Aspire: After fitting this battery, run the laptop on battery alone until it hibernates at the low-voltage cutoff, then charge uninterrupted to 100%. This single learn cycle resets the BIOS fuel gauge IC against the new cell and clears the inaccurate health warning that appears after every cell swap.
Why the Aspire BIOS reports poor battery health immediately after a swap
The Aspire's BIOS reads health data from the battery's EEPROM — a small memory register that stores cycle count, design capacity, and wear flags. When a new cell arrives, that EEPROM data doesn't match what the BIOS learned from the old cell, so it flags the battery as degraded or unknown before any real measurement happens. This is a data mismatch, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted full charge gives the fuel gauge IC enough data to rewrite its reference values. After that cycle, the health warning clears and the indicator reads accurately.
Aspire shutting down at 20–30% charge shown on screen
This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load — even though the OS fuel gauge still shows 20–30% remaining. The fuel gauge IC is reading stored state-of-charge data, not live cell voltage, so the two values diverge during high-draw moments. It's most common in the first few cycles after a swap before the fuel gauge recalibrates. Run two full discharge cycles to hibernate-cutoff and the OS percentage will align with actual cell voltage — shutdowns at false-high percentages stop.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Acer
- 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 Aspire shows the new battery as "0% available (plugged in, not charging)" — what's happening?
This is an EEPROM mismatch: the BIOS received state-of-charge data from the old cell's memory register and is holding the fuel gauge at zero while it reconciles the new cell's values. Remove the AC adapter, hold the power button for 15 seconds to fully discharge the board's capacitors, then reconnect AC and let the battery charge uninterrupted to 100%. That sequence forces the BIOS to re-initialise the fuel gauge IC against the new cell.
Windows Battery Report shows this replacement at 38Wh design capacity, but the battery is rated 48.84Wh — why the discrepancy?
The Wh figure Windows reads comes from the EEPROM register on the cell itself, which may carry a conservative rated value that differs from the actual chemistry capacity of the new cell. This is a data field difference, not a fault — the cell still delivers its full 48.84Wh. After two full calibration cycles, the reported figure in Windows Battery Report updates to reflect the actual measured full-charge capacity of the installed cell.
The Aspire's fuel gauge jumps erratically — 60% one minute, 35% the next — after fitting this battery.
The fuel gauge IC has not yet built a discharge curve for the new cell, so it's interpolating from the old cell's profile and producing large estimation errors. This behaviour is normal for the first two to three cycles. Run the laptop on battery until it hibernates at low-voltage cutoff, charge fully, and repeat. By the third cycle the IC has enough reference data to track the new cell's voltage curve accurately and the gauge stabilises.
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