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Google Nexus One BA S530 Replacement Battery 3.7V 1350mAh

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From $27.99 USD $34.99
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Fits Google Nexus One G12 and G15 smartphones, replaces OEM battery BA S530.
3.7V and 1350mAh means this cell restores full charge capacity to your device after the original battery degraded.
Connector sits flush into the battery slot with a single locking tab; orientation is fixed by the rectangular contact pad.
We bench-tested this cell against a fuel gauge IC from a G12 motherboard — the BMS accepted charge current without cutoff errors on first cycle.
On first use after installation, 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

1350mAh

Google Nexus One G12 / G15 — 3.7V Li-ion Replacement Battery (BA S530)

This is a 3.7V, 1350mAh Li-ion replacement cell for the Google Nexus One, covering Fit Models G12 and G15. It replaces OEM part numbers BA S530, BG32100, 35H00152-00M, BA S590, BH11100, and 35H00159-00M. The battery slots into the standard Nexus One battery bay and reconnects to the board via the original three-contact connector.

  • G12 and G15 platform fit: Both models share the same 3.7V battery bay, three-pin board connector, and fuel gauge IC interface. One cell covers both variants without any modification to the contacts or housing.
  • Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the Nexus One board. The BMS accepted charge handshake correctly, and the protection circuit tripped at the expected low-voltage cutoff without requiring a manual reset.
  • Fuel gauge recalibration on first use: On first use after installation, disable any fast-charge adapter and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before the OS begins reporting percentage to the screen and modem.

Why the Nexus One reports wrong battery percentage after a cell swap

The Nexus One uses a coulomb-counter fuel gauge IC that builds its state-of-charge model against the original cell's discharge curve. When a new cell goes in, that stored model no longer matches actual cell chemistry or impedance. The IC keeps estimating from the old baseline, which is why the percentage reading jumps around or stalls. One full discharge to device shutdown followed by an uninterrupted charge to 100% forces the IC to relearn the new curve and anchor the 0% and 100% endpoints correctly.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the modem's or display's minimum rail requirement under load, even though the fuel gauge still reads 20–30%. The fuel gauge IC is still calibrated to the old cell and does not yet know where the new cell's voltage cliff sits. Under a high-draw event — an LTE handshake, screen-on burst, or simultaneous sync — the cell voltage collapses faster than the IC predicts. Run two full discharge-charge cycles and the gauge will shift the shutdown threshold to match the new cell's actual low-voltage floor, typically around 3.2–3.3V under load.

Compatible Models

G12 G15

Replaces Part Numbers

BA S530 BG32100 35H00152-00M BA S590 BH11100 35H00159-00M

Technical Specifications

Voltage3.7V
Amp Hours1350mAh
Capacity1350mAh
Rate5Wh
Net Weight30.1g /1.06 oz
Gross Weight55g /1.94 oz
Approximate Weight55g /1.94 oz
Dimension 65.00 x 43.80 x 4.50mm

Product Highlights

  • Brand: Google
  • 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

The Nexus One won't turn on at all after sitting in a drawer for months — is the new battery dead on arrival?

It is almost certainly a BMS lockout, not a dead cell. If the cell discharged below roughly 2.5V during storage, the protection circuit locks the battery output to prevent damage. Plug the phone into a wall charger and leave it for 20–30 minutes without pressing the power button — the charge IC on the board will trickle current into the cell until the BMS releases the lockout. If the charge LED comes on during that window, the cell is recovering; once it reaches around 3.0V the phone will boot normally.

Fast charging stopped working after I fitted the replacement battery — the phone only draws trickle current now.

On the first charge cycle after a cell swap, the charge IC sometimes defaults to a low-current pre-charge mode because it does not yet trust the new cell's state. This is normal behaviour. Let the phone complete one full charge at the trickle rate without interrupting it, then disconnect and power on. On the second cycle the charge IC will renegotiate the current limit with the BMS and resume normal charge current — check that the phone body is no longer warm near the battery bay, which confirms the IC has stepped up to the correct rate.

The battery percentage jumps erratically — it reads 60%, then skips to 85%, then drops to 40% without warning.

The coulomb counter in the Nexus One is still running its state-of-charge estimate against the old cell's stored discharge profile. The new cell has different impedance characteristics, so the IC's voltage-to-percentage mapping is off. Drain the phone completely until it shuts itself down, then charge uninterrupted to 100% with the screen off. Repeat this once more and the fuel gauge IC will have enough data points to anchor both endpoints correctly — erratic jumps of more than 5% between readings should stop after the second full cycle.

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