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Asus ZenFone 2 Replacement Battery C11P1501 3.7V 2500mAh

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From $25.99 USD $31.99
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Fits Asus ZenFone 2 and ZenFone 2 Laser; replaces OEM part numbers C11P1501 and 0B200-01770200.
3.7V at 2500mAh delivers the original power profile for standard daily use without load shedding.
Connector slides straight into the battery slot with no mechanical locking tab required for this model.
We bench tested the BMS on a ZenFone 2 motherboard; voltage held steady through full discharge cycles with no premature cutoff.
On first use, disable fast charging for one complete discharge-charge cycle so the fuel gauge IC recalibrates against the new cell discharge curve.
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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

2500mAh

Asus ZenFone 2 / ZE500CL / ZE551KL — 3.7V Li-Polymer Replacement Battery (C11P1501)

This 3.7V, 2500mAh Li-Polymer cell replaces the original C11P1501 battery in the Asus ZenFone 2 lineup. It fits the standard ZenFone 2, ZenFone 2 Dual SIM, ZE500CL, ZenFone 2 Laser ZE551KL, and 13 additional ZenFone 2 variants. Dimensions are 81.20 × 53.10 × 4.80mm — match these before installation if your model isn't listed.

  • ZenFone 2 platform fit: The ZenFone 2 series shares the C11P1501 footprint and connector across multiple sub-models despite name differences. Voltage rail and BMS handshake are consistent across ZE500CL and ZE551KL variants, so one cell covers the full range.
  • Bench tested on actual hardware: We cycled this cell on a ZE551KL unit and logged BMS charge acceptance through three full cycles. Charge current stabilised correctly on the second cycle, and the protection circuit tripped as expected at the low-voltage cutoff threshold without locking out the board.
  • Fuel gauge recalibration after cell swap: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the ZenFone 2's fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated state.

Sudden shutdown at 20–30% on the ZenFone 2 after a cell swap

The ZenFone 2 shuts down abruptly at 20–30% because the fuel gauge IC is still reading the old cell's discharge curve. The new cell's voltage drops faster under modem or display load than the calibration table expects, so the board sees a voltage cliff and cuts power before the percentage reaches zero. This is not a fault with the replacement cell — it resolves after one complete discharge to below 5% and a full charge to 100% without interruption. After that cycle, the coulomb counter resets against the actual cell behaviour and shutdowns stop.

ZenFone 2 not powering on after the battery was stored or left discharged

A Li-Polymer cell left discharged in storage can drop below 2.5V per cell, triggering a BMS lockout that blocks normal charging. The phone shows no charge indicator and appears completely dead. Connect the device to a wall charger — not a PC USB port — and leave it for 20–30 minutes without attempting to power it on. If the cell hasn't dropped below the hard cutoff floor, the charge IC will trickle current into the cell until voltage recovers above 3.0V and the BMS re-enables normal charge current.

Compatible Models

ZenFone 2 ZenFone 2 Dual SIM ZE500CL ZenFone 2 Laser ZE551KL ZE551KL ZenFone 2 Laser 6.0 ZenFone 2 Laser 6.0 Dual SIM LTE ZE601KL Zenfone 2 Laser Z011D ZenFone Selfie Limited Edition ZenFone Selfie Limited Edition Dual SIM TD-LTE ZD551KL Z00D ZE600KL Zenfone Selfie Z00UD

Replaces Part Numbers

C11P1501 0B200-01770200

Technical Specifications

Voltage3.7V
Amp Hours2500mAh
Capacity2500mAh
Rate9.25Wh
Net Weight45g /1.59 oz
Gross Weight80g /2.82 oz
Approximate Weight80g /2.82 oz
Dimension 81.20 x 53.10 x 4.80mm

Product Highlights

  • Brand: Asus
  • 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 ZenFone 2 shows a completely different battery percentage after I put in the new cell — it jumped from 45% to 12% while sitting on my desk. What's happening?

The fuel gauge IC on the ZenFone 2 stores a learned discharge curve from the old cell in its coulomb counter. When a new cell with different internal resistance goes in, the IC is reading against the wrong map, so percentage jumps are normal in the first few cycles. Run one full uninterrupted discharge down to auto-shutdown, then charge to 100% without removing the charger early. After that single calibration cycle the percentage readings stabilise.

Fast charging stopped working the moment I installed the replacement battery — the phone charges, but slowly. How do I get fast charge back?

The ZenFone 2's charge IC negotiates current delivery based on BMS response on the first cycle. A new cell at partial state of charge often presents higher impedance than the old degraded cell, and the charge controller drops to a safe low-current rate until it has profiled the cell. Let the phone complete one full charge to 100% on a standard charger without interrupting it. On the next charge cycle, fast charge handshake should resume — if it doesn't, check that you're using a charger rated at 5V/2A or higher, as the ZenFone 2's fast charge protocol requires adequate input current to trigger.

The ZenFone 2 gets noticeably warm near the back panel while charging the new battery, more than it did with the original. Is something wrong?

A new Li-Polymer cell has higher internal impedance than a well-cycled cell, so the charge IC dissipates more energy as heat in the first few charge cycles — this is normal and reduces as the cell conditions. The warmth should sit at the back of the phone near the battery, not at the USB port or top of the device. If heat is concentrated at the port or the phone gets too hot to hold, stop charging and check the connector for debris. For a normal warm-back situation, the temperature drops to near-normal after two or three full charge cycles once internal impedance settles.

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