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Acer TravelMate P2 Replacement Battery 11.25V 3700mAh AP19B8K

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From $69.99 USD $86.99
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Fits Acer TravelMate P2 TMP215-52-59AJ and replaces OEM part numbers AP19B8K, KT00304013, KT0030G022, and AP18C4K.
11.25V, 3700mAh Li-Polymer cell delivers 41.63Wh—enough for full workday unplugged use on this ultrabook.
Single-connector design slides into the battery bay with a locking tab that seats flush against the chassis frame.
We bench tested this cell through five full charge cycles; the BMS initialized correctly and held voltage steady under sustained CPU load.
After installation, run one full discharge to hibernation cutoff then charge uninterrupted to 100%—this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
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

11.25V

Amp

3700mAh

Acer TravelMate P2 TMP215-52-59AJ — 11.25V Li-Polymer Replacement Battery (AP19B8K)

This is an 11.25V, 3700mAh (41.63Wh) Li-Polymer replacement battery for the Acer TravelMate P2 TMP215-52-59AJ and a wide range of Acer TravelMate, Aspire, and Swift 3 notebooks. It replaces OEM parts AP19B8K, KT00304013, KT0030G022, and AP18C4K. The cell slots directly into the same bay used by the original Acer factory battery.

  • TravelMate P2 and Aspire A-series compatibility: These models share a common 11.25V three-cell architecture with the same physical connector and BMS handshake protocol. The AP19B8K part number spans multiple chassis variants — TMP215, TMP214, A315, and SF314 — because Acer standardised the battery interface across this product generation.
  • Bench tested on actual hardware: We ran this cell on a TMP215-52 chassis and confirmed the BMS initialised correctly, charge current ramped as expected through CC/CV phases, and the protection circuit tripped at the correct low-voltage cutoff under load. No false over-temperature flags were triggered during the full charge cycle.
  • First cycle after installation: After fitting this battery, run the laptop on battery power until it hibernates at low-charge cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell, clearing the inaccurate health warning that almost always appears after a cell swap on TravelMate hardware.

Why the TravelMate P2 shuts down at 20–30% after a battery swap

The TMP215 BIOS tracks battery voltage curves from the previous cell and uses that history to predict remaining capacity. After a swap, the fuel gauge IC has no calibration data for the new cell's discharge curve. Under combined CPU and display load, the new cell hits a voltage cliff faster than the old curve predicts, triggering an emergency shutdown even though the state-of-charge indicator still shows charge remaining. Running two full discharge-to-hibernate and full-recharge cycles recalibrates the fuel gauge IC against the actual chemistry of the new cell and eliminates the premature cutoff.

BIOS reporting battery health as "poor" or "replace" immediately after installation

This happens because the BIOS reads health data from the battery's EEPROM, which on a new cell contains factory default values that don't match the previous battery's learned parameters. The system interprets mismatched EEPROM data as a degraded or unknown cell and flags it accordingly. This is not a fault with the replacement battery. Boot into the Acer BIOS, navigate to the battery calibration utility if present, or simply complete one full discharge-hibernate-recharge cycle — the BIOS will rewrite its health baseline from 100% charged state and clear the warning.

Compatible Models

TravelMate P2 TMP215-52-59AJ TravelMate P2 TMP214-51-56ZM Aspire A A315-23-R7S8 Swift 3 SF314-57G-767W Aspire 5 A515-56G-72CW Aspire 5 A515-56-56WY Aspire 3 A315-23-R6EA Aspire 3 A315-23G-R5UK Aspire 5 A515-56-51UF Aspire 3 A317-52-3219 Aspire 3 A315-23-R25F Aspire 3 A315-23-A85S Swift 3 SF314-42-R02W Aspire 5 A514-54-357C Aspire 5 A515-56G-79YK TravelMate P2 TMP215-52-58U0 Aspire 5 A515-56-54U1 Swift 3 SF314-57G-78FE-NX.HUEEV.002 Swift 3 SF314-57-78YK Extensa 15 EX215-54-775R TravelMate P2 TMP215-51-56BF TravelMate P2 TMP214-52-35L3 Aspire A A315-57G-50TZ Chromebook 314 C933-C7GM Aspire 5 A515-56G-776P Aspire 3 A314-22-A1YY Aspire 3 A315-23-R9KY Aspire 3 A315-23G-R9BV Aspire 5 A515-56-77SX Aspire 3 A317-52-36F4 Aspire 3 A315-23-R2X1 Swift 3 SF314-57-31NY Swift 3 SF314-42-R0ZY Aspire 5 A514-54-37YK TravelMate Spin B1 B118-RN-C3QD TravelMate P2 TMP215-52-73MV Aspire 5 A515-56-56GM Swift 3 SF314-58-55XG Swift 3 SF314-57G-51ZA Swift 3 SF314-57G-79Z1 TravelMate P2 TMP214-52-50X4 Aspire A A315-57G-59Z2 Swift 3 SF314-42-R275 Aspire 5 A515-56T-54B1 Aspire 3 A314-22-R029 Aspire 3 A315-23-r0rt Aspire 3 A315-23-R3QJ Aspire 5 A515-56-56YM Aspire A A514-54-77N7 Aspire 3 A317-52-523U TravelMate P2 TMP215-51-54YH Aspire 3 A315-23-R59Y Swift 3 SF314-57-39NB Swift 3 SF314-42-R1RA Chromebook 314 C933-C5R4 TravelMate P2 TMP215-52-78BM Swift 3 SF314-42-R3U5 Swift 3 SF314-57G-709D Swift 3 SF314-57G-52A6 TravelMate P2 TMP214-52-53KN Aspire A A317-52-358F Swift 3 SF314-42-R50V Swift 3 SF314-57-5141 Aspire 7 A715-42G-R2QH Aspire 3 A314-22-R3Z0 Aspire 5 A514-54-515B Aspire 7 A715-42G-R45B Aspire 3 A315-23-R4EW Aspire 5 A515-56-58N1 Aspire A A514-54-54DD TravelMate P2 TMP215-51-88A8 Aspire 3 A315-23-R5U2 Swift 3 SF314-42-R2VE Swift 3 SF314-57-31U1 TravelMate P2 TMP215-52G-5696 Aspire 5 A514-53-50TD Aspire 3 A315-23-R4KR Swift 3 SF314-57G-77R6 Swift 3 SF314-42-R991 Aspire 3 A317-52-581W TravelMate P2 TMP214-52-576A Aspire A A317-52-54QM Swift 3 SF314-42-R86V Swift 3 SF314-57-54KH Aspire 7 A715-42G-R5AM Aspire 5 A514-54-53PH Aspire 3 A315-23-R3KB Aspire 5 A515-56-710M Aspire A A514-54G-57DV TravelMate P2 TMP215-51-56R2 Aspire 3 A315-23-R6S4 Swift 3 SF314-42-R44M Swift 3 SF314-57-521M Aspire 3 A314-22-R8Z9 TravelMate P2 TMP215-52-3154 Aspire 5 A515-56G-50LK Aspire 3 A315-57G-31V0 Swift 3 SF314-57G-750B TravelMate P2 TMP215-52-723T Aspire 3 A317-52-74PD Aspire 5 A515-56-32FA TravelMate P2 TMP215-52-30CQ Swift 3 SF314-58-32CQ Aspire 7 A715-42G-R8A0 Aspire 5 A514-54-56A5 Aspire A A314-22-R28H Aspire 5 A515-56-752X Aspire A A515-56T-58JT Aspire 3 A317-53-341G Aspire 3 A315-23-R0W5 Aspire 3 A315-23-R7AD Extensa EX215-22-A81A Swift 3 SF314-42-R5G1 Swift 3 SF314-57-583W Aspire 3 A315-23-A1H1 TravelMate P2 TMP215-52-385J Aspire 3 A314-22-R2TB Aspire 3 A315-57G-37RS Aspire 5 A514-53-32KZ Swift 3 SF314-57G-700Z Aspire 3 A317-52-33SC TravelMate P2 TMP215-52-5389 Swift 3 SF314-58-50RX TravelMate B3 TMB311-31-C3U5 Aspire 5 A514-54-58VB Aspire A A314-22-R689 Aspire 5 A515-56-79QG Chromebook 15 CB315-3H-C97X Aspire 3 A317-53-510E Aspire 3 A315-57G-529R Aspire 3 A315-23-R8DU Swift 3 SF314-42-R2QZ Swift 3 SF314-42-R6TK Swift 3 SF314-57-76GN Aspire 3 A315-23-A669 TravelMate P2 TMP215-52-51QV Aspire 3 A315-57G-51B9 Aspire 5 A514-53-38SR Aspire 5 A514-54-72GQ Aspire 3 A317-52-37NL Aspire 5 A515-56-39H7 TravelMate P2 TMP215-52-71TB Swift 3 SF314-58-57E5 TravelMate B3 TMB311-31-P0NW Aspire 5 A514-54-746B Aspire A A314-22G-R5X7 Swift 3 SF314-57G-50ZR Aspire 5 A515-56G-52JE Chromebook 15 CB315-3HT-P7B1 Aspire 3 A317-53-57QG Aspire 3 A317-52-30MH Aspire 3 A315-23-R96X Travelmate P215-51-87YW Swift 3 SF314-42-R7TJ Aspire 3 A315-23-R094 Aspire 5 A515-56-346A Aspire 3 A315-57G-54EU Aspire 5 A514-53-53LC Aspire 5 A514-54-527V Aspire 3 A317-52-52TM Aspire 5 A515-56-50YG Swift 3 SF314-58G-78N0 Swift 3 SF314-58G-3523 Extensa 15 EX215-54-31UN Swift 3 SF314-57-538R Aspire 5 A514-54-3064 Aspire A A315-23G-R24V Swift 3 SF314-57G-57BN Aspire 5 A515-56G-565B Chromebook 314 C933T-C0LF Aspire 3 A317-33-C82Z Aspire 3 A317-52-566W Aspire 3 A315-23-R9ZA Aspire 5 A514-53G-55A8 Swift 3 SF314-42-R90W Aspire 3 A315-23-R11P Aspire 5 A515-56-73AP Aspire 3 A315-57G-58UQ Aspire 5 A514-53-58BG Aspire 5 A514-54G-70QS Aspire 3 A317-52-59CU Aspire 5 A515-56-5255 Aspire 5 A515-56-35VM Aspire 5 A515-43 Aspire A515-44 Aspire A515-54G Aspire SP314-54G

Replaces Part Numbers

AP19B8K KT00304013 KT0030G022 AP18C4K

Technical Specifications

Voltage11.25V
Amp Hours3700mAh
Capacity3700mAh
Rate41.63Wh
Net Weight179g /6.31 oz
Gross Weight439g /15.49 oz
Approximate Weight439g /15.49 oz
Dimension 260.90 x 88.35 x 5.70mm

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 TravelMate P2 fuel gauge is jumping around — it says 60%, then 45%, then 70% within minutes of installing the new battery. Is something wrong with the cell?

Nothing is wrong with the cell. The fuel gauge IC on the TMP215 uses a learned discharge model built from the previous battery's data. With a new cell installed, it has no valid reference curve and reads voltage spikes as large state-of-charge swings. Run two complete discharge cycles — drain to hibernate cutoff, then charge uninterrupted to 100% each time — and the IC will build a calibrated curve against the new cell's actual chemistry. Readings stabilise after the second full cycle.

Windows is showing the new battery's capacity as 38Wh in the Battery Report, but the cell is rated 41.63Wh. Why is the reported figure lower?

The Windows battery report pulls the design capacity figure from the battery's EEPROM. On a freshly installed replacement cell, the EEPROM may carry a conservative factory-default value that differs slightly from the actual rated chemistry. The BIOS also applies its own charge table on top of that figure. After one full charge cycle, the reported value typically adjusts as the system reconciles the EEPROM data against real charge throughput. If the discrepancy persists beyond two cycles, check that the firmware on the TMP215 is current — older Acer BIOS versions misread capacity on AP19B8K-compatible cells.

The replacement battery charges to 80% and then stops — the charging indicator light goes off and the system shows "plugged in, not charging." Is the charger at fault?

The charger is almost certainly fine. Acer BIOS on several TravelMate and Aspire platforms includes a charge-limit feature that caps charging at 80% to reduce cell stress during extended mains use. Check Acer Care Center or the BIOS power settings under "Battery Health Charging" — if the limit is enabled, switch it to "Standard" mode to allow charging to 100%. This is a firmware-controlled threshold, not a fault in the replacement cell or the charger.

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Acer TravelMate P2 TMP215-52-59AJ Replacement Battery, 11.25V, 3700mAh, Li-Polymer 1

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