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Vodafone Mini D100 Replacement Battery 3.7V 800mAh

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From $22.99 USD $28.99
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Fits Vodafone Mini D100, D101 models; replaces OEM part BYD070210145373.
Delivers 3.7V at 800mAh capacity; restores standard runtime to a degraded cell.
Connector and locking tab match original hardware; seats flush in the battery slot.
Tested on bench charge cycle; BMS accepted input without fault codes or cutoff anomalies.
On first power-on after installation, run one complete discharge-charge cycle without fast charging to let the fuel gauge IC recalibrate to this cell's discharge curve.
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.

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

800mAh

Vodafone Mini D100 / D101 — 3.7V Li-ion Replacement Battery (BYD070210145373)

This is a 3.7V 800mAh Li-ion cell for the Vodafone Mini D100 and Mini D101 compact smartphones. It matches the OEM part number BYD070210145373 and fits the same battery bay without modification. Dimensions are 51.80 × 30.10 × 5.70mm — confirm against your existing cell before installing.

  • D100 and D101 platform fit: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol, which is why a single cell covers the full range. Voltage rail and cell footprint are identical across Mini D100 and Mini D101 hardware revisions.
  • Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the D100 platform. The BMS accepted the cell without triggering a protection cutoff, and the charge IC completed a full constant-current to constant-voltage transition at 4.2V.
  • Fuel gauge recalibration after install: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes into an uncalibrated state — otherwise the OS percentage readout will drift.

Sudden shutdown at 20–30% on the Mini D100 after a cell swap

This is a voltage cliff issue, not a capacity problem. Under modem-active or display-on load, the new cell's terminal voltage drops sharply below the threshold the fuel gauge IC expects at that reported state-of-charge. The phone's low-voltage protection trips before the displayed percentage reaches zero. One full discharge-charge cycle lets the coulomb counter re-anchor its end-point voltage model to the new cell, and the premature shutdowns stop.

Phone warm near the battery compartment during the first charge

A fresh replacement cell typically arrives with elevated internal impedance compared to a broken-in cell. During the first constant-current charge phase, the charge IC dissipates more energy across that impedance as heat. This is normal and reduces after one or two full cycles as impedance settles. If the device stays warm past the second full charge, check that the charge IC is not stuck in a high-current mode — confirmed by reading the charge current via a USB meter; it should taper below 100mA as the cell approaches 4.2V.

Compatible Models

Mini D100 Mini D101 D100 D101

Replaces Part Numbers

BYD070210145373

Technical Specifications

Voltage3.7V
Amp Hours800mAh
Capacity800mAh
Rate2.96Wh
Net Weight16g /0.56 oz
Gross Weight41g /1.45 oz
Approximate Weight41g /1.45 oz
Dimension 51.80 x 30.10 x 5.70mm

Product Highlights

  • Brand: Vodafone
  • 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 Vodafone Mini D100 powers off suddenly when the battery still shows 25% — is the replacement cell faulty?

This is a voltage cliff, not a defective cell. At high load — modem transmitting, screen on — the new cell's terminal voltage sags below the threshold the fuel gauge IC associates with 25%, triggering a low-voltage shutdown before the display percentage reaches zero. Run one complete discharge down to automatic power-off, then charge uninterrupted to 100%. After that full cycle, the coulomb counter recalibrates to the new cell's discharge curve and the premature shutdowns stop.

The battery percentage jumps around erratically after I installed the new cell — it reads 60%, then drops to 40% within minutes without heavy use.

The fuel gauge IC is still calibrated to the old cell's charge curve. It was tracking a degraded cell with a collapsed capacity window; the new 800mAh cell has a completely different voltage-to-capacity profile. The IC needs at least one full discharge-to-charge cycle to re-anchor its internal model. Do not top up or interrupt the cycle — let the phone discharge to shutdown, then charge straight to 100% in one go, and the percentage readout will stabilise.

The phone won't power on at all after the replacement battery sat unused for a few months — not even the charging screen appears.

Extended storage drains the cell below 2.5V per cell, which triggers BMS lockout — the protection circuit disconnects the cell entirely to prevent damage, and the phone cannot draw enough current to boot or show the charging screen. Plug into a wall charger, not a PC USB port, and leave it undisturbed for 20–30 minutes. A wall adapter delivers enough trickle current to push the cell above the BMS re-enable threshold; once it recovers to around 3.0V, the phone will display the charging indicator and boot normally.

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