AL13B3K Acer Aspire R7 Replacement Battery 15.2V 3500mAh
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AL13B3K Acer Aspire R7 Replacement Battery 15.2V 3500mAh - 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.
AL13B3K Acer Aspire R7 Replacement Battery 15.2V 3500mAh - is backordered and will ship as soon as it is back in stock.
Voltage
15.2V
Amp
3500mAh
Acer Aspire R7-571 / M5-583 Series — 15.2V Li-ion Replacement Battery (AL13B3K)
This is a 15.2V, 3500mAh (53.2Wh) Li-ion battery for the Acer Aspire R7, R7-571, R7-571G, and M5-583 series convertible notebooks. It replaces OEM part numbers AL13B3K, KT.00403.013, AP13B3K, AP13B8K, AC13B8K, and related variants. The connector and BMS handshake match the original 4-cell configuration these models shipped with.
- R7 and M5-583 cell compatibility: These models share a 4-cell 15.2V architecture with the same connector pinout and BMS communication protocol. A single replacement covers both lines without adapter or firmware workaround.
- Bench tested on actual hardware: We ran this cell on an R7-571 chassis and monitored the BMS handshake through full charge and discharge cycles. The protection circuit responded correctly to over-voltage and thermal thresholds — no false cutoffs observed.
- Post-install calibration on the R7 hinge platform: After fitting, run one full discharge to hibernate-cutoff, then charge uninterrupted to 100%. The Aspire R7's BIOS uses a battery learn cycle — skipping this step leaves the fuel gauge IC uncalibrated and triggers a false low-health warning in the system tray.
BIOS reporting poor battery health immediately after fitting the AL13B3K
The Acer Aspire R7 BIOS reads health data from EEPROM embedded in the battery pack. A new cell ships with factory EEPROM values that do not match the charge history the BIOS expects to see. The system interprets this mismatch as a degraded cell, not a new one. One full discharge-to-hibernate followed by an uninterrupted charge to 100% resets the learn cycle and clears the warning without any BIOS update or driver change.
Aspire R7 shutting down abruptly when the gauge reads 20–25% remaining
This is a voltage-cliff failure — the cell voltage drops below the BMS cutoff threshold under combined CPU and display load before the fuel gauge reaches zero. It happens because the gauge IC was calibrated against the old cell's discharge curve, not the new one. The fix is the same calibration cycle: drain fully to hibernate-cutoff, then charge to 100% without interruption. After two complete cycles the gauge IC maps accurately to the new cell and the premature shutdowns stop. Target full-charge resting voltage is 16.8V across the pack terminals.
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
My Acer Aspire R7 shows the battery as "unknown" or 0% in Windows right after I put the new AL13B3K in — is the battery dead?
It is not dead. The Windows fuel gauge IC is reading EEPROM data from the old cell and has no reference curve for the new one yet. Run the laptop down to hibernate-cutoff on battery alone, then plug in and charge uninterrupted to 100%. After one or two full cycles the gauge recalibrates against the new cell and reports correctly.
The Aspire R7 charges to exactly 80% then stops — why won't it go higher?
The Acer BIOS includes a charge-limit setting that caps charging at 80% to reduce long-term cell stress. This is a firmware control, not a fault with the replacement cell. Open Acer Care Center or check the BIOS power settings and disable the charge limit — the battery will then charge to 100%.
Windows is showing this battery as 53Wh but my system info tab says the original was rated differently — which number is right?
The 53.2Wh figure in Windows comes from the EEPROM data embedded in the new cell, which reflects actual rated chemistry for the AL13B3K. Older system-info readings were pulled from the previous cell's EEPROM and are no longer relevant. Confirm the correct value by opening a Command Prompt, running `powercfg /batteryreport`, and checking the Design Capacity line — it should read approximately 53,200mWh.
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