Acer Nitro 5 AN515-43-R41A Compatible Battery 15.4V 3700mAh AP18E8M
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Acer Nitro 5 AN515-43-R41A Compatible Battery 15.4V 3700mAh AP18E8M - 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 Nitro 5 AN515-43-R41A Compatible Battery 15.4V 3700mAh AP18E8M - is backordered and will ship as soon as it is back in stock.
Voltage
15.4V
Amp
3700mAh
Acer Nitro 5 AN515-43 Series — 15.4V Li-Polymer Replacement Battery (AP18E8M)
This is a 15.4V, 3700mAh (56.98Wh) Li-Polymer battery for the Acer Nitro 5 and Aspire 5 laptop lines. It replaces OEM part numbers AP18E8M, AP18E7M, KT.00407.007, and KT00407009. It fits the AN515-43, AN515-54, and AN517-51 series, among 340 additional Acer models sharing the same battery bay and connector spec.
- AN515 and AN517 series fit: These Nitro models share a common 15.4V four-cell battery rail, the same ZH1.25 connector pinout, and an identical BMS handshake protocol — which is why one SKU covers the full range without modification.
- Bench tested on actual hardware: We cycled this cell on an AN515-54 chassis. The BMS accepted the new cell on first boot, reported charge current correctly through the EC, and held voltage above 14.8V through a sustained CPU-plus-GPU load draw.
- Post-install calibration on Nitro 5: After fitting, run the laptop down to hibernate cutoff under normal use, then charge uninterrupted to 100%. This single cycle resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.
Why the Nitro 5 shuts down at 20–30% after a battery swap
The Nitro 5 EC uses stored discharge curves from the old cell to predict cutoff voltage. With a new cell installed, those curves no longer match actual cell chemistry, so the EC triggers a shutdown well before the cell is depleted. The symptom looks like a faulty battery but is entirely a calibration issue. Running two full discharge-to-hibernate cycles forces the EC to rebuild its fuel map against the new cell. After that, the gauge and cutoff threshold track correctly.
BIOS showing battery health as "poor" immediately after fitting a new cell
The Acer BIOS reads health data from EEPROM registers inside the battery's BMS — not from live voltage measurements. When a replacement cell ships, those registers reflect factory defaults, not a full charge history, and the BIOS flags this as degraded. This is not a fault with the cell. Complete one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%. The BIOS battery health indicator will update after the learn cycle completes and the register values normalise.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Acer
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-Polymer
- Battery Type: Li-Polymer
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Acer Nitro 5 says the new battery is 0% and won't charge — is the cell dead on arrival?
Almost never. The Nitro 5 BIOS reads charge state from EEPROM data inside the BMS, and a freshly installed cell ships with factory-default register values that the BIOS misreads as empty or unknown. Plug in the AC adapter, leave it connected for at least 30 minutes without powering on, then boot normally. The charge controller will initialise the cell and the gauge will begin tracking correctly — typically within the first full charge cycle.
The fuel gauge on my Nitro 5 is jumping around — showing 60%, then 45%, then 70% within minutes of unplugging.
The fuel gauge IC calibrates itself against a discharge curve built from real-world cycles on the installed cell. A new cell has no history in that IC, so readings are interpolated from incomplete data and swing widely. This behaviour is normal for the first two to three cycles. Run two full discharges to hibernate cutoff, charging fully to 100% between each, and the gauge IC will lock onto an accurate curve — swings of more than 5% after that point to a separate fault.
Windows shows this battery has a 45Wh capacity but the spec says 56.98Wh — is something wrong?
The Wh figure Windows reports is pulled from the EEPROM "design capacity" register, which the BMS populates during the first completed charge-discharge learn cycle. Before that cycle runs, the register holds a conservative factory placeholder that reads lower than rated. Complete one full uninterrupted charge to 100% followed by a full discharge to hibernate, then check again in Windows Battery Report — the reported Wh value will update to reflect the actual cell capacity.
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