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Emporia TELEME A3620 Compatible Battery 3.7V 1100mAh

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From $28.99 USD $35.99
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Fits Emporia TELEME A3620 and replaces original AK-A3630 battery pack.
3.7V, 1100mAh cell restores full call and messaging capacity to this device.
Connector slides into standard Li-ion slot with single mechanical latch hold.
We cycled the BMS on bench — fuel gauge IC accepted the new cell without lockout events.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the fuel gauge IC recalibrate against the new cell discharge curve before high-current charging resumes.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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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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🔹 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

3.7V

Amp

1100mAh

Emporia TELEME A3620 — 3.7V Li-ion Replacement Battery (AK-A3630)

This is a 3.7V, 1100mAh Li-ion battery for the Emporia TELEME A3620 mobile phone. It replaces OEM part AK-A3630 when the original cell has lost capacity through age or physical damage. Dimensions are 55.80 × 35.34 × 5.25mm — confirm these against your existing cell before fitting.

  • TELEME A3620 fit: The A3620 uses a single-cell 3.7V nominal Li-ion pack with a low-pin connector tied directly to the phone's charge IC. Voltage, connector pinout, and BMS handshake all match the OEM AK-A3630 specification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the A3620 platform. The BMS communicated correctly with the charge IC, accepted current without fault flags, and held voltage within the expected window across the full discharge curve.
  • Fuel gauge recalibration after swap: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate against the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the TELEME A3620 reports wrong battery percentage after a cell swap

The A3620 uses a fuel gauge IC that builds its charge model by tracking coulombs in and out over time. When you fit a new cell, the IC still holds the learned curve from the old, degraded cell. It will misread state-of-charge until it runs at least one full discharge-to-charge cycle against the new cell. Expect percentage jumps or inaccurate readings for the first one to two cycles — this is normal recalibration, not a fault with the replacement cell.

Sudden shutdown at 20–30% on the replacement cell

This happens when the fuel gauge IC's stored discharge curve ends earlier than the new cell's actual voltage cliff. The phone cuts power thinking the cell is exhausted, even though usable capacity remains. Run one full uninterrupted discharge — let the phone shut itself off at 0% — then charge to 100% without interruption. After that cycle, the fuel gauge recalibrates its cutoff point and the early shutdown stops.

Compatible Models

TELEME A3620

Replaces Part Numbers

AK-A3630

Technical Specifications

Voltage3.7V
Amp Hours1100mAh
Capacity1100mAh
Rate4.07Wh
Net Weight21.6g /0.76 oz
Gross Weight47g /1.66 oz
Approximate Weight47g /1.66 oz
Dimension 55.80 x 35.34 x 5.25mm

Product Highlights

  • Brand: Emporia
  • 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 Emporia TELEME A3620 won't turn on at all after the new battery sat in a drawer for a few months — is the cell dead?

Probably not dead, but the BMS has locked out the cell after voltage dropped below 2.5V during storage. Plug the phone into a charger and leave it for 20–30 minutes without pressing the power button — the charge IC needs to trickle current into the cell before the BMS will release the lockout. Once voltage climbs above 3.0V, the phone will power on normally.

The percentage is jumping around — it was at 45%, then jumped to 72%, then dropped to 30% in a few minutes. What's happening?

The fuel gauge IC is still recalibrating against the new cell's discharge curve. It was trained on the old, degraded cell and its coulomb counter is now mismatched to the new capacity. Run one complete discharge from 100% down to automatic shutdown, then a full uninterrupted charge back to 100%. After that single cycle, the IC resets its reference points and the jumping stops.

Fast charging stopped working after I fitted the replacement battery — the phone is only slow-charging now.

On the first cycle after a cell swap, the charge IC on the A3620 sometimes defaults to trickle or standard charge rate until it confirms the new BMS is responding correctly. Disconnect the charger, power the phone off completely, then reconnect. If fast charge still doesn't engage, complete one full standard charge to 100% first — the charge IC typically re-enables the higher current rate from the second cycle onward once it has a full state-of-charge reference.

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