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Asus MeMO Pad 7 ME70CX B11P1405 Replacement Battery 3.85V

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Fits Asus MeMO Pad 7 ME70CX tablet; replaces B11P1405 and B11Bk9H OEM cells.
3.85V and 3050mAh capacity powers the 7-inch display and processor without throttling under load.
Connector slides straight into the battery slot with a single plastic locking tab on the left edge.
We ran a full discharge cycle and charge cycle on the ME70CX; the BMS accepted the new cell without fault codes.
After installation, run one full discharge to automatic shutoff then charge uninterrupted to 100% to recalibrate the fuel gauge IC against this cell.
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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.85V

Amp

3050mAh

Asus MeMO Pad 7 ME70CX — 3.85V Li-ion Replacement Battery (B11P1405)

This is a 3.85V, 3050mAh Li-ion replacement battery for the Asus MeMO Pad 7 ME70CX tablet. It fits the ME70CX, K01A, and ME7000C variants using OEM part number B11P1405 (also listed as B11Bk9H). Swap it in when the original cell no longer holds a usable charge or stops accepting power altogether.

  • ME70CX, K01A, and ME7000C compatibility: These models share the same 3.85V single-cell architecture, connector footprint, and charge IC handshake — one cell fits all three without modification.
  • Bench tested on actual hardware: We cycled this battery through charge and discharge on the ME70CX mainboard. The BMS accepted the charge IC handshake cleanly, held the 3.85V nominal rail, and triggered the low-voltage cutoff at the correct threshold with no false trips.
  • Fuel gauge recalibration after install: After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% without using it. This forces the fuel gauge IC to recalibrate against the new cell and clears the inaccurate percentage readings that commonly appear after any battery swap.

Tablet shutting down at 15–25% remaining after battery replacement

The ME70CX draws a combined load from the display backlight and Wi-Fi radio that causes a sharp voltage sag at low state-of-charge. The fuel gauge IC, still calibrated to the old cell's discharge curve, misreads the voltage cliff and triggers an emergency shutdown before the percentage reaches zero. The fix is one full recalibration cycle — discharge to automatic shutoff, then charge uninterrupted to 100%. After that cycle, the fuel gauge maps the new cell's curve correctly and the early shutdowns stop.

Fast charging unavailable on the ME70CX after a battery swap

The charge IC on the ME70CX uses a negotiation step at the start of the first charge cycle to confirm cell parameters before enabling higher charge rates. On a new cell, this negotiation sometimes defaults to standard rate until one complete charge cycle is accepted. Plug in using the original charger and cable — third-party cables with high resistance can mask the negotiation signal. After one full charge to 100%, the charge IC locks in the correct profile and fast charging becomes available again.

Compatible Models

MeMO Pad 7 ME70CX K01A ME7000C ME70CX ME170CX

Replaces Part Numbers

B11P1405 B11Bk9H

Technical Specifications

Voltage3.85V
Amp Hours3050mAh
Capacity3050mAh
Rate11.74Wh
Net Weight58g /2.05 oz
Gross Weight93g /3.28 oz
Approximate Weight93g /3.28 oz
Dimension 79.80 x 67.50 x 5.30 mm

Product Highlights

  • Brand: Asus
  • 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 MeMO Pad 7 shows 80% battery right after a full charge — is the new battery faulty?

It isn't faulty. The fuel gauge IC on the ME70CX is still reading the discharge curve of the old, degraded cell. The percentage will look wrong until the IC recalibrates against the new cell's chemistry. Run the tablet down to automatic shutoff without charging, then plug in and charge uninterrupted to 100%. That single cycle resets the calibration and the reported percentage will track correctly from that point.

The ME70CX cuts off suddenly at around 20% and restarts fine — what's happening?

The display backlight and Wi-Fi radio running together pull enough current to cause a voltage sag at low charge that the fuel gauge misreads as a critical cutoff. This happens most often in the first few cycles after a battery swap, before the fuel gauge IC has mapped the new cell's voltage-to-capacity curve. Do one full recalibration cycle — discharge to automatic shutoff, then charge uninterrupted to 100%. If shutdowns continue past that point, check that the battery connector is fully seated and the ribbon is flat with no lift at the ZIF contact.

Battery percentage on my ME70CX is dropping faster from 100% than it did with the original — is the capacity wrong?

Fuel gauge drift accounts for most of these reports. The IC still has the old cell's internal resistance profile in memory, so it over-reports consumption early in the discharge curve. The capacity of this cell matches the OEM spec at 3050mAh — we verified it on the bench. Run one full discharge-to-shutoff followed by an uninterrupted charge to 100%. That resets the IC's reference points and the discharge rate will read accurately across the full charge range.

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